5. BDSM - Secretary
Indie hit Secretary is among the more popular films on this list because it's one of the few that's tonally optimistic (on the whole) and actually makes a case for why the fetish isn't weird or something to be smirked at. The story centers on a lawyer (James Spader, who we'll be seeing again in a little bit), who dominates his submissive secretary (Maggie Gyllenhaal), by spanking her, dressing her up as dogs and horses, and generally just torturing her to sate his control freak nature. More so than any other film on this list, Secretary is an emotionally engaging film with exceptionally well-drawn characters; we want to see these two get together, and when they do in the end (while continuing their dominant-submissive relationship), it makes for one of the strangest, kinkiest romantic pairings in recent memory.