NO!
Masturbation is actually physiologically useful!
I’ve quoted this before, but here it is again:
“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’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.”
-Mary Roach in The Curious Coupling of Science and Sex