House- He complains a lot and makes fun of people, so you leave him at home
Wilson- You guys almost never find time for shopping but when you guys go, you get in and out
Chase- Chase gets a lot of junk food, he sneaks it in the cart and smiles innocently when you glare at him when you're checking out
Kutner- He fills the cart with chocolate while you look at the list you made
Thanks :p