If this guy is your significant other…
Get naked, make him the sandwich (making sure to show off your goods profusely as you do), then throw it in the trash, and hang around the house nude all day and don’t let him get any.
Or maybe sit near him and eat peanut butter and jelly with your fingers from the jars, moaning. Wipe your fingers clean with slices of bread, then eat those. Still refuse to let him get any.