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PloS One Sep 2010Studies of animal mating systems increasingly emphasize female multiple mating and cryptic sexual selection, particularly sperm competition. Males under intense sperm...
BACKGROUND
Studies of animal mating systems increasingly emphasize female multiple mating and cryptic sexual selection, particularly sperm competition. Males under intense sperm competition may manipulate sperm quantity and quality through masturbation, which could waste sperm and decrease fertility. I examined the factors influencing masturbation by male Cape ground squirrels (Xerus inauris) in light of a number of functional hypotheses.
METHODOLOGY
Observational data on a marked population of squirrels were collected in east-central Namibia using scan and all-occurrences sampling.
FINDINGS
Masturbation was far more frequent on days of female oestrus and mostly occurred after copulation. Masturbation rates were higher in dominant males, which copulate more, than in subordinates and increased with number of mates a female accepts.
CONCLUSIONS
These results suggest that masturbation in this species was not a response to sperm competition nor a sexual outlet by subordinates that did not copulate. Instead masturbation could function as a form of genital grooming. Female Cape ground squirrels mate with up to 10 males in a 3-hr oestrus, and by masturbating after copulation males could reduce the chance of infection. Sexually transmitted infections (STIs) can profoundly affect fertility, and their consequences for mating strategies need to be examined more fully.
Topics: Adaptation, Physiological; Animals; Female; Male; Masturbation; Mating Preference, Animal; Namibia; Sciuridae; Sexual Behavior, Animal
PubMed: 20927404
DOI: 10.1371/journal.pone.0013060 -
Archives of Pediatrics & Adolescent... Dec 2011To assess masturbation prevalence, frequency, and associations with partnered sexual behaviors.
OBJECTIVE
To assess masturbation prevalence, frequency, and associations with partnered sexual behaviors.
DESIGN
Cross-sectional survey.
SETTING
The United States of America.
PARTICIPANTS
Nationally representative samples of adolescents aged 14 to 17 years.
MAIN OUTCOME MEASURES
Solo masturbation, partnered sexual behaviors, and condom use.
RESULTS
Across age groups, more males (73.8%) reported masturbation than females (48.1%). Among males, masturbation occurrence increased with age: at age 14 years, 62.6% of males reported at least 1 prior occurrence, whereas 80% of 17-year-old males reported ever having masturbated. Recent masturbation also increased with age in males: 67.6% of 17-year-olds reported masturbation in the past month, compared with 42.9% of 14-year-olds. In females, prior masturbation increased with age (58% at age 17 years compared with 43.3% at age 14 years), but recent masturbation did not. Masturbation was associated with numerous partnered sexual behaviors in both males and females. In males, masturbation was associated with condom use, but in females it was not.
CONCLUSIONS
Sexual development is a dynamic process during adolescence, and masturbation is an enduring component of sexuality. Fundamental differences appear to exist between male and female sexual expression. Health care providers should recognize that many teens masturbate and discuss masturbation with patients because masturbation is integral to normal sexual development.
Topics: Adolescent; Condoms; Cross-Sectional Studies; Demography; Female; Humans; Male; Masturbation; Prevalence; Sex Factors; Sexual Partners; United States
PubMed: 21810625
DOI: 10.1001/archpediatrics.2011.142 -
Disease-a-month : DM Aug 2018
Review
Topics: Adult; Behavior, Addictive; Education, Medical; Ejaculation; Erotica; Female; Guilt; Humans; Hysterectomy; Male; Masturbation; Medicine; Middle Aged; Pelvic Floor Disorders; Selective Serotonin Reuptake Inhibitors; Sex Offenses; Sexual Dysfunctions, Psychological; Urinary Incontinence, Urge
PubMed: 29880262
DOI: 10.1016/j.disamonth.2018.05.007 -
The Turkish Journal of Pediatrics 2000This study was performed to investigate the clinical outcome of childhood masturbation. For this purpose 50 children (mean age = 48.7 +/- 24.5 months, 34 girls females...
This study was performed to investigate the clinical outcome of childhood masturbation. For this purpose 50 children (mean age = 48.7 +/- 24.5 months, 34 girls females and 16 boys males) with masturbation symptoms were examined at first visit to the Department of Child Psychiatry and two years thereafter with psychiatric interviews. The mean masturbation frequency at the initial interview was significantly decreased after two years. It was noted that 39 children (78%) were completely recovered and 11 children (22%) continued to masturbate after two years. Children who did not recover were significantly younger, began to masturbate earlier and masturbated more frequently than others at the time of initial evaluation. It was concluded that the findings about the beneficial effect of sedative drugs in combination with parental guidance, education and means for behavior modification were promising.
Topics: Age of Onset; Behavior Therapy; Child; Child, Preschool; Comorbidity; Female; Humans; Infant; Longitudinal Studies; Male; Masturbation; Psychotropic Drugs; Statistics, Nonparametric; Treatment Outcome; Turkey
PubMed: 11196747
DOI: No ID Found -
Pediatric Clinics of North America Feb 1958
Topics: Humans; Masturbation
PubMed: 13504999
DOI: 10.1016/s0031-3955(16)30619-8 -
La Psychiatrie de L'enfant 1992
Topics: Adolescent; Fantasy; Humans; Masturbation; Psychoanalytic Theory; Psychological Theory; Psychology, Adolescent; Suicide
PubMed: 1496047
DOI: No ID Found -
Archives of Sexual Behavior Dec 1972
Topics: Female; Humans; Masturbation; Methods; Orgasm; Sexual Dysfunctions, Psychological
PubMed: 4680816
DOI: 10.1007/BF01541865 -
Indian Journal of Pediatrics Aug 2001A 3.5-month-old boy was referred to our hospital with the diagnosis of infantile spasm. His developmental milestones and physical examination were normal. During the...
A 3.5-month-old boy was referred to our hospital with the diagnosis of infantile spasm. His developmental milestones and physical examination were normal. During the follow-up we recorded about six to nine attacks a day and the duration of attacks was changed between 15 seconds-1.5 minutes. During the episodic attacks he was flushed and had tonic posturing associated with crossing of thighs, without loss of consciousness and his eye movements were normal. Routine and long-term electroencephalogram (EEG) were normal during attack. The patient was diagnosed as masturbation according to the clinical and EEG findings. In conclusion, we would like to stress that masturbation should also be considered in infants who were admitted with complaint of seizure, and aside from EEG monitoring a detailed history and careful observation are very important factors in differential diagnosis of these two different conditions.
Topics: Diagnosis, Differential; Electroencephalography; Humans; Infant; Male; Masturbation; Neurologic Examination; Physical Examination; Seizures
PubMed: 11563256
DOI: 10.1007/BF02752422 -
Archives of Sexual Behavior Nov 1978To elucidate a number of hypotheses about the development of sexual responsivity in women, a random sample of 100 undergraduate women was interviewed about their...
To elucidate a number of hypotheses about the development of sexual responsivity in women, a random sample of 100 undergraduate women was interviewed about their masturbation histories, techniques in masturbation, and the relationship of masturbation to intercourse. Masturbation had been practiced by 74%. It began most commonly as an accidental discovery. Learning the sexual nature of masturbation from peers and written sources seemed to result in methods more imitative of heterosexual activities and to increase the enjoyment and goal-directedness of the behavior. The view that experiencing sexual pleasure depends on social transmission of scripts was thus supported. Several techniques were related to orgasm ability in masturbation and intercourse. Women who were orgasmic in masturbation and who masturbated with that goal were more likely to continue the behavior than those with other goals. Frequency of masturbation and frequency of intercourse were not related, failing to support the notion of a unitary "sex drive". Nor was "clitoral fixation" documented by any relationship between reliance on clitoral stimulation in both masturbation and intercourse. Masturbating to orgasm was not related to orgasm ability in intercourse.
Topics: Adolescent; Adult; Attitude; Female; Humans; Masturbation; Orgasm; Psychosexual Development; Sexual Behavior
PubMed: 742965
DOI: 10.1007/BF01541922 -
BJU International Dec 2003
Topics: Adolescent; Humans; Male; Masturbation; Spermatic Cord Torsion; Testis; Ultrasonography
PubMed: 19127683
DOI: 10.1111/j.1464-410x.2003.04194.x