70s-80s vintage porn scene: Young blonde with teddy bear tries to sleep/ignore, watches couple fuck on sofa, masturbates, man uses magic/telekinesis to rip her clothes off, joins threesome - leather vest macho guy? Loop or compilation?

Looking for help ID'ing a vintage porn clip/scene I saw on silent VHS (likely 1970s-1980s, possibly European or American hardcore Golden Age).
Not sure if it was a full movie, short loop (10-30 min), or part of a compilation/bootleg tape.
Core scene:

Very youthful-looking blonde girl (long straight hair, big breasts, very pretty/hot). Runaway/hitchhiker vibe, picked up by a couple (man + woman).
Man is macho/black-haired, dark/black clothes including black leather vest/jacket (biker/macho style).
In a room (motel/apartment?), girl wears almost nothing - single front-and-back sheet/apron wrap. Holds a teddy bear/stuffed animal, tries to sleep/ignore them (guy invites her to join but she pretends not to).
Couple has intense sex. Girl sits on sofa/couch watching, gets aroused, masturbates while watching.
Man notices/uses superpower/magic/telekinesis - her minimal clothes suddenly fly off/rip away. She joins in threesome.
Modern setting, no sci-fi/space