Naked male buttholes in films and movies

The best I've seen was Matt Czuchry's hole in I hope they serve beer in hell, though there's no way to know if that's actually him or a perfectly matched body double, but you can see actual hole.
I can't remember if I saw that entire movie, but the diarrhea scene was crazy (crazier than American Pie or Dumb & Dumber).
Matt Czuchry (1).jpg
 
The only film (I know) on German mainstream TV in which the camera literally zoomed in the buttcrack of the main actor ANDREAS PIETSCHMANN was "Männer- alles auf Anfang".
the guy from dark , wtf I had crush on him for years ,.. anyone have the video