well, there's never been any holding them back in our current household!
Here's some general rules, however.....
If he farts in bed, he'll fluff the doona so ....so must you.
If his farts wake you up during the night - make sure he knows it. That's ok, he'll just be proud and it wont bother him. But if you wake him, pretend to be asleep and try not to shake with laughter under the doona.
Silent but deadlies...SBDs - try NOT to do them in lifts or corners or you will be found out. Also, never in small rooms where there's only a few of you. You might get away with it in the boss's office if he's much older, but that's about it.
Shopping centres and nightclubs are good for farting - there's always plenty of noise.
Never ever try to time a fart with a car door closing....it never works and timing is always out. And noone will believe it's frogs because there aren't many around these days.
Try not to have capsicum, apples, onion or milkshakes for lunch. Apples are really bad, I find.
If you get pain and the unbelievable need to fart instantly, you do have a problem. They will always be loud, you will be uncomfortable and you should drink yakult, eat yoghurt, avoid milk and cream and possibly wheat for a while and let your tummy settle down. Maybe drink some green tea or chamomile tea.
Sometimes, it's important to give yourself a break from farting.....no matter how much you enjoy it.