Tinder's law

The Law of Tinder states if a tinder profile contains a picture with 2 or more people and it's not obvious who the tinderee is, the owner of the account - in almost all cases - is the least attractive person in the picture.

"Hey, I can't tell who Danielle is from her pictures... Who do you think it is"
"Tinder's law man, it's that ugly one on the end"