I don't think it is because man has larger arsholes then
woman. Can't be, not logical, right?
I believe woman also fart but is more discrete. Woman tends
to control the urge to break wind in front of man by going to
a corner to fart.
Man just can't be bothered.
ya. to make a loud fart, gas has to be squeezed very tightly. so
loud fart implies tight arsehole.