Also if anyone of such supposed guys know everything "a sperm can't last that long" well then, how long does a sperm last?
Sperm either floats or sinks in water. It coagulates into lumps.
It doesn't, however, swim through cold, disinfected water through swimming clothes (quite thick and with a gusset) and into a virgins vagina.
Sperm tends to be very, very welcome when its already inside said Vagina and ejecting from a pretty boys cock.
Number of women impregnated via traditional method: several billion. Number impregnated by swimming pool method 1 (allegedly).
Odds of swimming pool method of conception - several billion to one, if not more.