I have been looking for this one for a few years now and I finally tracked it down. It was definitely worth the effort! The premise and dialogue is highly misogynistic on its surface, but I think you have to take it as far as Chuck Vincent does here if you're going to laugh at it.
Sex Appeal is so trashy while remaining silly. It's jam-packed with a who's who of adult film actors and actresses. There is even Debbie Does Dallas alum Merle Michaels here!
I don't know what it is about Chuck Vincent but he was able to strike a pretty solid "silly/raunchy" balance a few times back in the day. Maybe it's because he was a gay man writing and directing ultra-hetero male comedies so he could truly see their innate absurdity? I don't know, I'm probably reading too far into his mostly forgotten gems.
RIP Mr. Chuck VIncent