I wish I had sources to site for this, but I can remember reading case studies on the bio-chemical effect of human sexual interaction doing grad work in college. I believe they were done by Dr. Martie Hasselton, but they outlined the endorphin and hormonal profiles present in healthy adults bloodstream's while in various phases of attraction, arousal, pre-sex and post-sex interaction between couples. The most dramatic one to look up is the similarities in the chemical properties of dopamine and heroin for people experiencing "love" or "infatuation" depending on who's doing the study.
Even more fascinating is the effects hormones play on portions of men's brains when assessing sexual cues in a potential sex partner. Healthy testosterone literally causes men to perceive women as sexual objects; stimulating the same portions of our brains used for cognitive problem solving. However, testosterone is mitigated by oxytocin, the hormone secreted just post orgasm. While testosterone is responsible for sex drive and aggressive impulses (not to mention muscular development, deepening of voice and hair growth), oxytocin is linked to feelings of nurturing, trust, and comfort. Oxytocin is believed to be a primary influence in post-sex, and post pregnancy, emotional attachment in women who produce the hormone in much higher amounts than men. The effect of post-orgasm oxytocin in men is similar to women, however in men it is also serves as a buffering agent to heightened dopamine and testosterone levels.
In addition to all of this, there's the role that pheromones play in regard to sexual attraction and arousal. You can google these, but there are several pheromonal studies that indicate that men with differing scents from those of women tend to attract opposite scents in women. From an evolutionary perspective the conclusion drawn is one that people of the same genus or phenotype (i.e. blood related family members) will be less aroused sexually by persons of the their own phenotype, thus ensuring biodiversity (nature's prevention plan against inbreeding). However in the same "sweaty t-shirt" studies, the perspiration of men with higher testosterone levels were deemed more sexually viable or arousing by women than men with lower T levels.
You can attribute whatever legitimacy you want to studies like this, but the evidence points to higher testosterone levels as playing an influential part in sexual attraction. Also bear in mind that pheromones influence women living in close proximity to each other to synchronize their menstrual cycles - another evolutionary mechanism to ensure fertility and communal support for social animals.
From a bio-mechanical perspective, the indication is that men who consistently masturbate are pheromonal betas - and women's bio-chemistry registers this for them. Higher testosterone males manifest their sexual viability in both sexual assertiveness and scent. If you are chronically depleted of testosterone, and/or subjected to the calming effects of oxytocin your sexual viability is at a disadvantage. In fact, from an evolutionary standpoint, the beta males of our feral hunter-gatherer beginnings would be more prone to masturbation as a sexual release since, theoretically, they would've had less access to breeding opportunities than Alpha males. It would then follow that definitive, subconscious behavioral and chemical indicators would evolve to aid females in selecting the best mate for parental investment.
So, for as much as guys would like to have you believe that snapping one out before a date will improve your chances of ƒucking the girl, odds are you're shooting yourself in the foot. This stupid belief is rooted in the "Something about Mary" myth that women don't want an overly sexualized man, but the biological truth is far from that. The myth is one that women need to be comfortable with a guy in order to sleep with him, so men will actively desexualize themselves in order to comply. However, all indications point to a need for sexual anxiety and tension in arousal to prompt sexual intercourse. Comfort and trust are post-orgasm conditions; anxiety, arousal and sexual urgency are pre-orgasm conditions.
