至 clover28 :Thanks a lot! I found it on IAFD, and it says it was made in 1971, but more importantly, the girl I was after (the skinny one) is Marsha Bishop, and this appears to be her only on-screen sex.
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clover28
至 ilmarop :As far as I know the film is called "Harlot" and was made in 1970.
