Teenage Madam (1977)

Madam Rose agrees to allow a research psychologist to interview her "working girls" to further the cause of sex education. Rose relates her first day as a Teenage Madam, when she inherited her late mother's business, and her very first client was "Big John" Holmes. Her girls relate more recent experiences, such as a tough trucker who likes to be spanked ... but then they're interrupted by the news that Rusty's "special friend," Patrick, has proposed, and they'll be leaving forthwith. This is cause for a celebration, in which everyone gets naked and goes to town. The scene in the finale with Kathy Marsh and John Holmes has no match in adult video, as he nearly splits the young lady in half ... the agony on her face and tears in her eyes are not feigned. Reason, perhaps, that this was her one and only adult video appearance?