Well the point of them is to be funny
a man hits a woman while driving his car, whose fault is it? the mans, he shouldn't have driven through the kitchen
If there only existed one gender, I believe there would still be people. Many species reproduce asexually. As Doctor Malcolm says, 'life finds a way'.
That's why they're jokes...
And according to genesis without Adam's rib, there'd be no women...
Science, son. Science.
sarcasm, "son". Sarcasm.
Ah, I see. Carry on.
science has made it possible for women to produce a child without the help of men whatsoever.
Science has also made it possible for men to produce a child without the help of women whatsoever.
And according to some scientist's theories, without acid rain and rocks, neither of us would be here.
A joke doesn't mean you desire the entire non-existance of one gender.