You never have to shake hands with people you don't like
You can get away with outrageous behaviour-people feel bad about chastising crips and people also excuse such behaviour because they assume you have 'issues' to do with the arm...poor deluded fools
We learn the art of smoking and drinking at the same time (BLISS) because of the way we have to hold the beer and fag in one hand
You get to sit down on the tube
You don't feel obliged to clap at crap gigs
You never have to peel potatoes (remember-not peeling spuds is an advantage, as is not being able to open tins, chop meat, cut bread-forget the ingenious gadgets, eat junk food)
You can freak people out with it
The muscle wastage trims pounds off your weight
You never have to jive with your pissed uncle at family gatherings
Your kid's mates are really impressed with the arm
....and I just asked Pete if there were any advantages for him- he said it was great I could only hit him with one hand!