Find a large women at a bar or anywhere and take her home. Get her to sleep with you and rail her from behind. When you start to finish yell at her "Your a fat bitch!". She will act like a bull and try to throw you off, but hold on as long as you can and keep going at it.
Last night i gave some fat bitch a tub of lard rodeo and she was thralling around for 5 minutes!