It was the late 80's and my friends and I were having a "bad movie" night with a barbarian theme. The Conan movies were way too high-budget to be eligible.
The lead character was a female barbarian who had been captured (don't remember how) by an evil/mad scientist. In the scene I remember most vividly, he had her strapped to a table spread-eagle by her wrists and ankles, with the table tilted to the not-quite-vertical. He walked up to her and tried to erm... Okay, I'm not sure what the family-friendliness requirement is here, so I'll be a little circumspect. He got overly friendly with her, but as soon as he made contact she captured him with her barbarian-strong vaginal muscles, then executed a pelvic thrust which put him so off balance that he tumbled backward into the conveniently placed pool of acid and died.