She’s already nailed the cheesy dialogue — and now former soap opera villain Kelli McCarty has decided … she just wants to be nailed.

[TMZ.com]- The former Miss USA 1991 — yeah, she was a frickin’ beauty queen — has quit the mainstream acting biz for a shot at a career in “adult entertainment.”

McCarty, who played maniacal Beth Wallace on “Passions” for seven years, just wrapped on her first XXX feature, “Faithless,” in which she plays the lead character to a very very supporting cast..

So, why the career move? Here’s the explanation — “I enjoy acting,and I really like sex … so this was the perfect opportunity to combine two of my passions.”