'Total Recall' Remake -- Full, Naked Triple Breasts DESPITE PG-13 Rating

Millions of 13-year-old boys' dreams are about to come true -- TMZ has learned, the 3-boob'd lady in the new "Total Recall" movie WILL be showing FULL NIPPLES ... despite the film's PG-13 rating.

People have been speculating ever since news broke Sony was rebooting the classic R-rated 1990 flick, starring Arnold Schwarzenegger -- which features a 3-boob'd prostitute who proudly shows off three naked nipples.

Now, a rep for Sony tells us, the new movie won't disappoint when it premieres at midnight -- because the revamped 3-boob'd lady will ALSO be going fully topless ... sans the nipple strip she flaunted at Comic Con this year.

It's surprising ... considering the new movie's rated PG-13 -- and this kind of nudity is rare in PG-13 movies.

But it's not unheard of -- here's a list of other famous PG-13 movies with bare boobies ... "Titanic," "The Fifth Element," "Something's Gotta Give," "Forrest Gump," and "Splash."

As for the actress who played the original triple threat -- Lycia Naff -- she's pleased by the news, telling TMZ, it's pointless to go through hours of makeup and prosthetic attachment just to leave out the "best part" ... "those little chocolatey nuggets."

Um, what she said.