So while this isn't a horror film, I feel compelled to bring this one up anyway (especially since I have a personal attachment to this movie). When I was around 5 or 6, my dad (who loves action films btw) was watching Rambo 2, and when I saw the scene of Sylvester Stallone half-naked and covered in mud, it made me realize what being gay was. Then came the scenes where he gets tied up and tortured, and that's what spurred my interest in bdsm.
After that, whenever my dad would watch action movies (especially ones starred Sylvester Stallone or Jackie Chan), I would sit and watch with him and while he thought we were bonding over his love of action flicks, in reality, I only cared about the muscular men LOL.