Water Drops on Burning Rocks (2000)

In 1970s Germany, Leopold, a 50-year-old businessman, picks up and seduces 20-year old Franz, who swiftly moves into his bachelor pad. Their cozy relationship soon sours as Leopold turns cranky and argumentative. When Franz’s buxom blond girlfriend surfaces, and then Leopold’s elegant and enigmatic ex, things get funnier, steamier and a lot more complicated.