The Idol (1985)

A man hitchhikes when his car breaks down. Three younger women offer him a ride upon recognizing he is John Holmes. Holmes asks to watch them together before joining in. When they're done, the women spike his drink and tie him up. They want to reveal the secret to their friend, but she's busy with her lover. She then joins a friend couple, just after they finish a "bondage on water-bed" session. The buxom kidnapper arrives to tell the tale. But since her fantasy involves a threesome, the guy from the couple and the lover offer her what Holmes couldn't. Implying he was abused for months, Holmes asks a visiting Reator to free him. Instead, the buxom Realtor and her client force themselves on him, until he agrees to continue if they untie him. The client's husband eventually catches them. As Holmes gives the wife her first orgasm, the older Realtor takes the husband aside to fulfill his own fantasy of her.