All this talk about Justin Bieber's butt [1] has got us thinking about man butts in general. (As if we don't regularly have them on our minds.) Butts are so underrated, so we are here to hype them up. Let's look at our favorite — and sexiest — man butts we can possibly find all in one gallery. Keep reading because the asses just get hotter and hotter, there's no buts about it . . . Leave that computer screen dim because this stuff is NSFW.

Fassbender Butt

Bomer Butt

J Lo's Backup Butt

Tatum Butt

Pettyfer Butt

Hint of Efron Butt

Werewolf Butt

One Direction Butt

Humping Hunnam Butt

Some British Guy's Butt

Kwanten Butt

One of Those Butts Is Bradley Cooper's Butt

Pitt Butt

Beckham Butt

Lutz Butt

Wolverine Butt

Running Gyllenhaal Butt

Skarsgard Butt

Hemsworth (of the Chris Variety) Butt

Game of Thrones Butt

Bale Butt

Kitsch Butt