The act of giving someone a Stink Bomb involves quite an elaborate scheme. First, you wear the same pair of underwear for at least two weeks straight. It is important that during this period you do alot of aerobic exercises to really get your stinky-ass juices flowing. Also remember, the longer you wear them, the stinkier the bomb. Next, you choose a victim. Your mortal enemy is usually a good target, but anyone will work. Finally, you wait until the victim is at their most vulnerable (during sleep is always a good time) and rub the soiled underwear all other their mouth and nose.
I stink bombed my roomate the other day. He hasn't been the same ever since.