whatever you just don't understand the joke thats y u say its not funny.OK!
When the man say "IF you would put a rubber at the end of YOUR stick, we'd be riding the bus" he's saying if the other man had used protection another word condom, they would be riding the bus b-cuz he wouldn't have all those kids. so when he says his STICK it means his private part, the long one. (if u knwo wat i mean)LOL don't take it personal!