Love the pre code films in tarzan an his mate there is a brief nude scene of the guy taking his bath .he has just arrived and decide to take a bath strips down on camera as he gets in the tub you can see his bare ass
Male naked butts are common in today's films. I remember my wife complaining that she was tired of seeing them in PG-13 romantic comedies. I jokingly said she should try R rated ones for a different view. She didn't appreciate my humor.