It's quite common knowledge that men are "cock-driven". Healthy young man with active testicles will feel a strong URGE to ejaculate their seeds. In short: Men have a strong biologic urge/drive coming from their testicles and the effect of Testosterone to engage in sex or masturbation. I was wondering whether women experience a similar biological urge to engage in sex or masturbation, as men do. From a biological point of view the only time it would make sense for a women to feel an urge to engage in sex is during the time of ovulation, i.e. when she can get pregnant. Other women may have a higher level of testosterone and thus more 'fueled' urges. It may be difficult for a person to asses whether the desire for sex/masturbation comes from a biological urge or from other reasons (lust, "having fun", attraction, ..) But, if you engage in sex or masturbation, what comes first? A.) The stimulus (e.g. meeting an attractive person or having a 'naughty thought' or the desire to "have fun" just because it's pleasant) which then leads to sex or masturbation OR B.) The sexual urge (i.e. the need to "bust some balls" in men's world) which leads you to search for willing partners, or watch/read porn or imagine some fantasies ? Your feedback is appreciated.