With twins Christy Ann and Chrissy Ann posing side-by-side on the box cover, and a story of them fooling their lovers about who's making love to who (one twin is the "bad girl," one the good, one does anal, one does not), the movie was an instant hit.
Although Chrissy Ann and Christy Ann are described here as twins, in More Dirty Debutantes 29 (1993) they state that they are, in fact, not twins.