You can enter into a contract for almost anything you'd like, if you don't like the terms you don't have to agree (and thus not get the money). > This would be

You can enter into a contract for almost anything you'd like, if you don't like the terms you don't have to agree (and thus not get the money). > This would be akin to telling my dad that I will gift him a car for his birthday, but on the condition that he can never sell it or rent it out or re-gift it to his friend. If he doesn't do as I say, I'll sue him to get the gift (car) back. I think it's more like an agreement that you can use the car as long as you keep your grades up and obey a curfew.