Farts

Farts, trumps, bottom burps, blow offs, whatever you want to call them, they are probably the funniest thing that the human body can do, but only when done A)properly and B) by a man.
Women should never let one rip unless they are alone and miles away from possibly offending any over zealous ears, you see, farting is a mans game, it was invented by men and should only ever be done by men, it's a male bonding thing, and basically, women shouldn't get involved with anything that takes them away from the washing and ironing and talking about kittens.
When a man has a good one brewing, he'll not run off to the toilet and be selfish enough to let it go in private, there is nothing worse than coming from the toilets alone laughing to yourself, no, a man will share the experience with his fellow men and sometimes women, usually to rapturous applause, laughter and possibly even setting down a gauntlet which someone else will try to beat, immediately, thus starting the 'Mexican fart'.
I can also advise lighting the fart for added effect, it makes you look really talented and is a great talking point (especially at weddings) the only problem here is that you can burn your trousers, or if you are really experienced you can burn down the whole building, you've seen the towering inferno...
the other blessed thing about the fart is the smell, your own never smell that bad, but the reaction you can get from your fellow man is utterly satisfying, their faces turn a shade of green, some even try to fashion a gas mask out of their shirts, this is followed by 'the calleth of names' which is the only time you can be really derogatory to someone and get away with it, mainly because you are laughing as you say it, and for the guilty person, the worse the insult then the more satisfied you feel. Everyone who is male can get involved, and have consideration for the deaf, if you are going to fart, then make it smelly.