@AlexW00d: Well then why do people have milk with cereal, why do people have butter on bread? Some foods get better accompanied by another item.
In both of those cases it's cause the main thing would be dry otherwise. Chips aren't dry, unless whoever cooked them is a bad cook.
One of my favourite things about going to Ireland a lot is the way they chuck stuff on their chi[s - Curry Cheese Chips! and if you're real crazy you can add bacon, its a meal in itself. But then over here (in the UK) you can do the whole, kebab and chips in pita bread with chilli sauce...mmmm...now I'm hungry!
Depends on the kind of fries. I'll eat ketchup with fries from same places. Others, I'll only dip them in mustard. From most Fast Food joints, like McDonald's, or Hardees, I'll not eat with condiments. Arby's fries, I'll eat with ketchup. Home made fries, mustard. Etc.
Chips don't need condiments, you nasty people.