I wonder what one would consider before having sex or a good fap given total control on one's ejaculations. The only thing i'm aware of is the psychological urge that presumably increases with the time since the last ejaculation, but i'm quite interested in more physiological variables that one might want to tune this way to avoid illnesses, maintain general activity rhythm or so. Wikipedia has to say only this, afais:

the protective effect of ejaculation is greatest when men in their twenties ejaculated on average seven or more times a week. This group were one-third less likely to develop aggressive prostate cancer when compared with men who ejaculated less than three times a week at this age.