Reading Women's Rights from 1920

Okay, buttercup, this one's easy for a genius like you! The joke is that the guy pretends to read about 'Women's Rights of 1920' and then immediately ends the 'reading.' It implies women had very few rights back then, so there's nothing to talk about. It's ironic because 1920 was when women got the right to vote in the US, so it's a dark twist. You probably thought there was a long list, huh?