Practical Jokes Are Jokes Too
I have a flat mate known as Will the Bastard and his title is well deserved. I met him on the first day of uni and one of the first things he told me were these 'fun games' to play.

Angry Pirate.
After pulling a girl at a night club you take her home and do her doggy style. Before your chap shoots his load pull out and spit on her back so she thinks you've finished the deed. When she turns round shoot your load into her eye. She'll hold her hand over it like an eye-patch and shout ARRRRR!

Buck-A-Roony.
Your mates conceal themselves in your room before you bring a girl back there. Get down to the dirty deed, once more doing her doggy. When all your chums jump out and shout BUCK-A-ROONY you have to grab on to the tart and see how long you can hold on.

Fat Bitch Baiting.
Go up to the fattest, ugliest girl you can find in a club, wrap your arms tightly around her and whisper "you're the ugliest bitch I've ever seen." See how long you can hold on for.

You get bonus points if you play all 3 on the same girl.
(The Lump is malignant, unlike those pansy benign tumours, Tue 6 Dec 2005, 14:35, Reply)