>>212768788 (OP)I'd say mid-20's. Most people lose it a decade before then, if you're still a virgin at 18, most people would think it's odd, but you could still explain it away by being a late bloomer. At 25 you should've had so many chances, school, uni, gap year, whatever, that still being a virgin at that age irrevocably puts you in the weirdo incel category.
t. 33 year old virgin who has stopped caring