A radical feminist is getting on a bus when, just in front of her, a man gets up from his seat.
She thinks to herself, "Here's another man trying to keep up the customs of a patriarchal society by offering a poor, defenseless woman his seat", and she pushes him back onto the seat.
A minute later, the man tries to get up again.
She is insulted again and refuses to let him up.
This goes on a couple more times over the next few minutes.
Finally, the man says, "Look, lady, you've got to let me get up. I'm a half mile past my stop already."