Cold Light of Day (1989)

Real-life serial killer Dennis Nilsen(Bob Flag)'s descent into homicidal depravity is documented in the bleak art-house horror flick The Cold Light of Day (1989). Between 1978 and 1983, this seemingly mild-mannered former soldier killed and dismembered at least fifteen men and teenage boys before disposing of their bodies, some by literally flushing them down his drain. That's pretty gruesome stuff, but thankfully Claire King steps in to give us a moment of sweet relief baring her sweet teats as she entertains a client.