I've been looking for a movie who's title I can't remember as I was young and scared when I saw it. What I can remember is that it was animated (I think) like a weird 2d animation and had a character who was hostage to some aliens if I remember correctly. I think he had a lover with him and then he had to escape killing his captives. It was very weird and scary and if I'm not wrong there was some sexual content in the movie too.

Found it, Thank you all.