Sexual desire have been associated with a decline in sexual desire. Though it is not used as medication, the drug methamphetamine has a strong positive effect on many aspects of sexual behaviour, including sexual desire. Sexual desire is said to be influenced by androgens in men and by androgens and estrogens in women. Many studies associate the sex hormone, testosterone with sexual desire. Testosterone is mainly synthesized in the testes in men and in the ovaries in women. Another hormone thought to influence sexual desire is oxytocin. Exogenous administration of moderate amounts of oxytocin has been found to stimulate females to desire
Sexual frustration For males it could be that they have testicles and no penis; a male might be born without a penis (aphallia) or be born with one and have it removed (penis removal or penectomy). Men can still ejaculate via prostate stimulation in that case. For females they might not have a clitoris which causes sexual pleasure; a female might have had her clitoris forcibly severed (female genital mutilation) or voluntarily removed (female circumcusion) as part of a medical procedure. Involuntary celibacy is a form of sexual frustration. Sexual frustration Sexual frustration in humans is frustration caused by a discrepancy between