Entwined (2019)

Entwined is an artistic movie that debuted at the Toronto International Film Festival in 2019. It's about a doctor who comes across a very curious woman when he moves to a small remote town. She has a skin condition that makes her skin look like tree bark. She's all bark and no bite! Kidding aside, the doctor's fascination with the woman turns to love. However he's not the one who gets naked here. That would be Kostas Laskos, billed simply as an old man who is caught by the doctor having sex. We see his butt in the flick's only nude scene. If you're looking for anything more, you're barking up the wrong tree!