Proof John Cena Wasn't Fully Naked on the Oscars Stage, Privates Covered

John Cena stripped down to practically nothing to pull off a streaker bit at the Oscars ... but we now know just how much skin he really showed, and what was actually covered up.

The wrestler-turned-actor took to the Dolby Theatre stage in Hollywood, Calif. in nothing but nude-colored modesty wear to make it appear like he was really naked at the annual industry event. In other words, his junk/ass was covered up after all, so he wasn't totally naked.

As you can see from the new photos ... John was totally unfazed by the minimal amount he had to wear -- as he smiled offstage while waiting for his hilarious segment to begin.

He was even snapped shushing a few people behind the scenes while rocking only Birkenstock sandals and an impressive timepiece.

Remember, John is no stranger to performing in little to nothing -- he famously wrestled shirtless while rocking only denim jorts throughout most of his WWE career.

As for how he pulled off his onstage quick change to present the Best Costume Design category ... the video above shows several Oscars production assistants draping John in fabric as the nominee montage played.

And the commitment to the bit has certainly paid off -- JC's appearance has been applauded as one of the night's highlights.

Other notable moments at this year's Oscars include Emma Stone ripping her dress during Ryan Gosling's performance of "I'm Just Ken," Jimmy Kimmel and Donald Trump exchanging words mid-show, and "Twins" costars Arnold Schwarzenegger and Danny DeVito's reuniting onstage.

Ya gotta wonder how John's ex, Nikki Garcia, felt about the bit -- as she was also in attendance working the Oscars red carpet.