I don't know if this was already made, but basically it goes like this:
You tell a reason why you like the person above you, and the next person tells why they like you.
Example:
You tell a reason why you like the person above you, and the next person tells why they like you.
Example:
Person 1: Because he is cool.
Person 2: Because he is person 1.
Person 3: Because 2 is a cool number.
etc... xD