We start with a question that is essentially unanswerable to begin with:
Actually, there is one sensible response: “Who the hell cares?” But then we get to the heart of the matter:
I am a male but I am not feminine?
This has got to be a metalaw somewhere: “All old wives’ tales end up being circulated by boys.”
I was tempted to tell him “Doesn’t matter, since either one is longer than your peen,” but that seems (slightly) unkinder than necessary. Still, this morbid fear that someone of equal immaturity will call him out will not serve him well in the future, assuming he has one.