When domesticated, a Jonny can be put to good use in the kitchen, making tea and baked potatoes.
However, they demand excessive payment in the way of dominating your World of Warcraft gaming time, and bottles of sherry. (They also like to take your last Marlboro when you're not looking, and if not hidden, will also 'look after' your green for you until they think you should smoke it with them.)
He will usually make snide comments just because he knows he can. He's no one's best friend, but he's sometimes close.
Usually underappreciated, but still well-liked. Skinny, not very strong usually. Usually called gay by jocks and the like; untrue, a Jonny is straight.
Very opinionated, and loves easily.
Jonny: If there were dead rats in it, wouldn't you be poisoned? (laughingly)
Mark: Dude, shut up.
(random chick): haha.