Laughing at men's jokes has nothing to do with whether the jokes are funny or not: it would have made a lot more sense to examine how attractive/powerful in relation to the women the males telling the jokes were.* We're talking obsequious deference and reflecting at twice natural size here, aren't we? This is a bit like saying bosses' jokes are hilarious because everybody laughs at them: the sycophants.

*Okay, there are some men who really are really, really funny and are able to 'laugh women into bed' in spite of any obvious disadvantages. They are not in the majority