One thing men have to deal with is the idea that we're "gross" our whole lives. We can have been married for years with an active sex life, but if we're naked at the wrong time or do something different in bed or whatnot, the reaction from our partners is often, "Gross." This idea of our penis being gross and ejaculation being gross and so on, is conditioned over time by the reactions of our partners and society as a whole. So men are often left feeling like their sexuality and biology are some how not fine, but repulsive. The implications of course are numerous.