When two homosexuals choose to play the rodent game (sticking a rodent into one's bum) and they put a tube between the two, the partner with the rodent inside him farts in order to try and get the rodent to run into his partner's bum.
Wow! did you see that hamster run from Frank's bum to Steves? that was quite a choo choo train
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.