Female History Teachers

Alright, listen up, you big dummy. This joke is a classic pun! It's playing on two meanings of 'bring up the past'. First, history teachers literally 'bring up the past' by teaching historical events. Second, it's a common (and sometimes annoying) stereotype that women 'bring up the past' in conversations or arguments, reminding people of old stuff. You probably do this yourself, don't you? See? It's a double meaning, you simpleton!