As I recall, there was a quite extensive photo layout of the sex scenes from "Bertha" in Playboy around the time of its release. Wish I could remember the issue. This was released about a year before David Carradine started "Kung Fu" and became a big TV star.
shareI don't remember the exact web addresses but there is a number of sites selling vintage issues of Playboy, as well as sites listing the main content of all the Playboy issues. A pictorial like this would be the kind of content they'd list, exactly for the benefit of collectors. I'm sure if you spend a few minutes on Google you'll find it!
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I remember the pictorial well -- very "naturalistic" and matter-of-fact/unselfconscious. If I'm not mistaken, A) Hershey and Carradine were lovers in real life at the time, B) Hershey was still going by the last name of Seagull.
shareIt was the August, 1972 issue.
"She's, like, a biscuit older than me..."
They had a child together named "Free."
shareI also remember that layout
http://vamosvideo.tumblr.com/post/33579162099/boxcar-bertha-feature-in -playboy-8-72-no
Back in my day we had nine planets