I find it extremely hard to believe that a man who doesn't get any play or doesn't masturbate will have a wet dream just so his system will clean out the old sperm and make way for the new sperm.
Hmm. lets see, I don't know what you majored in in college, but I'm microbiolgy/genetics double, so I think I know a thing or two more about this are. So yes, the body will flush out old sperm in wet dreams. Masturbation is a more common technique to achieve this means, not so much because we need to (I've already stated the wet dream thing) but its jsut easier. It also not only releases aggression, but also is just very calming overall. Many people find having sex helps them sleep because the chemical changes due to an orgasm spur a greater level of melatonin release. But whatever, you can believe what you want, I'm just stating my side of the coin.
