Does masturbation have any effect to a person's hair?

The idea that masturbation will cause you to grow hair in places where hair doesn't normally grow (such as the palms of your hands) or that it will lead hair to disappear is a very old myth. It falls into the same category as "it will shrivel up and fall off", which obviously isn't true either. My guess is that these myths originated as a way to discourage people from masturbation. (It didn't work!)

There is really no negative effect of masturbation, as long as you don't use anything dangerous like soap or the vacuum cleaner to help things along. :)