Indecent Proposal (1993)
Not the sexiest movie on this list -- by a long shot -- Indecent Proposal still has a pretty sexy premise, though it pushes more into romance territory. Sweethearts David (Woody Harrelson) and Diana (Demi Moore) have gone to Las Vegas to try to win the cash to build their dream home -- but, of course (it would be a short movie otherwise), they lose their life savings instead.
However, billionaire John Gage (Robert Redford) has noticed Diana and offers a million dollars to spend the night with her. The money is too good for the couple to refuse, but it forms a rift in their relationship. Will she stay with John or rejoin her increasingly bitter husband? Spoiler alert: unlike a lot of other movies on this list, there's a more or less happy ending to this one, without a single murder.