Sex physiologist Roy Levin explained to me that sperm which sit around the factory a week or more start to develop abnormalities: missing heads, extra heads, shriveled heads, tapered and bent heads. All of which render them less effective at head-banging their way into an egg. Levin speculates that that’s why men masturbate so much: It’s an evolutionary strategy. “If I keep tossing myself off, I get fresh sperm being made.” Thereby upping the likelihood of impregnating someone and passing on your genes. Though if conception is the goal, you don’t want the sperm to be too fresh. Daily
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