The House Where Evil Dwells (1982)

100 years ago, a gory murder/suicide went down in Kyoto, Japan, when a man found his wife cheating on him. After killing them both with a samurai sword (because what else?), he killed himself, and the three ghosts were trapped inside the house. When an American family moves in, they sense the evil presence in the house but unwisely decide not to listen to the advice of the Zen monk who knows what's about to happen to them. Soon enough, the ghosts possess the couple, and the woman begins an affair with another American dude. You know what happens next—an ghostly effort to reenact the murder suicide and liberate the ghosts from the doomed house. It's not exactly pretty, but with every good affair comes good sex and a House Where Evil Dwells is no exception. Doug McClure, who plays the philandering diplomat in question, shows off his bare buns when he bangs Laura in her marital bed. Talk about an ass worth dying for!