How do you play a trick on your girlfriend?

Marry her... *** Tell her that you gave her herpes. Once she starts crying, go, "Psych! " That is a very cruel trick. *** dress in thug clothing and wear a mask. Then hide in a corner and grab her butt as she passes by, while yelling "GOTCHA!" loudly. Have her watch Texas Chainsaw Massacure and that night pop up in her room with a hockey mask and a runnig chainsaw and then rev the chainsaw very loudly while blasting Puddle of Mudd's Psyco.----In the middle of the night put her hand into a bowl of water she will wet herslf----.put spider in her hair