Looking for early 80s porn video where a guy uses theater popcorn butter as anal lube.

I rented this video on VHS back in 1984. Was the first video I ever saw. I know the year because I rented it and Purple Rain the first week Purple Rain released to video. Since it was 36 years ago, memory of who was in it is fuzzy. I just recall them being in a small room that was supposed to be a movie theater closet. They had anal sex and they had a pump dispenser with the movie theater popcorn butter in it. The guy squirted that on his cock and slipped easily in her back door. 36 years of clouded memory thinks it might have been Ron Jeremy, but I am about 51% sure of that.