Gender is like:
HEY, YOU GOT YOUR VAGINA IN MY PENIS!
HEY, YOU GOT YOUR PENIS IN MY VAGINA!
https://youtu.be/O7oD_oX-Gio
I just made the sexual undertones of the commercial more explicit, which means overt, or obvious, and thus, funny
not to say that only obvious things are funny, actually people often say that obvious jokes are the worst kind, but I don't know if I agree, I think sometimes the most obvious joke is the best one for the job
And why do they matter?