Yesterday's bumtastic quizz - deadline extended (Patreon)

Since I didn’t get any answers yesterday, I’m extending the deadline by one more day and adding the uncropped version to make it a little easier.…to encourage participation, I will offer a prize to anyone who correctly guesses one of these delectable derrières and two prizes to anyone who correctly guesses both. 

Come on guys, let‘s make this a bumstastic start of the week!