One movie that put the sexploitation in blaxploitation was Black Shampoo (1976). This here montage set to the mackin' "Mr. Jonathan" by Gerald Lee from the film's soundtrack attests to the sexually-charged feel of the movie — even without the wall-to-wall nudity that appeared on screen. For mature audiences only please.
Scenes from Black Shampoo directed by Greydon Clark.
(Props to davidfromlille for the funky edit)