Repulsion (1965)

Repulsion (1965), Roman Polanski's first English-language film, stars Catherine Deneuve (who, sadly, doesn't get de-nude) as a virginal vavoomstress living with her sis in a London flat. Sis Yvonne Furneaux is having an affair with a married sort (Ian Hendry), and Cath is a wee bit disturbed by their fling—though she finds sex both sizzling and sickening. Left alone when Yvonne goes off on a vacation de fellatin' with her paramour, Cath starts to go a little mad, seeing surreal visions of seduction, lip suction, and even some aggressive sex. Rapidly disintegrating, the scintillating Ms. Deneuve goes so de-nuts that she has to take time off from her de-job as a manicurist. Just how dangerous is Deneuve? Enough to resort to de-murder?