Dakota Johnson needed a butt double for Fifty Shades of Grey, but not because she didn't want to show off some skin on screen.
One erotic scene called for a close-up shot of Johnson's naked butt, but the 26-year-old actress apparently has a tattoo on her rear which wouldn't work for her sexually innocent character, Anastasia Steele.
RELATED: 'Fifty Shades of Grey' Stars Open Up About Filming in the Red Room
Fifty Shades of Grey cinematographer Seamus McGarvey revealed the news about Johnson's ink in a New York Times interview about the process of shooting sex scenes for movies and TV.
"We did have a butt double for Dakota," McGarvey recounted. "I had the pleasure of casting a non-tattooed bottom."
The Oscar-nominated cinematographer said some of the most bizarre moments of his 25-year-long career happened while filming Fifty Shades.
"[Johnson] had kind of a patch that went over her pubic area, and right round her whole body," McGarvey shared. "We were in the curious situation, in postproduction, of adding [pubic hair]."
WATCH: Jamie Dornan Gets Shirtless and Wet to Remind Us 'Fifty Shades Darker' Will Be Seriously Hot
"I wouldn't say it was one of the highlights of my career, but it certainly was one of the most surreal scenarios," McGavey added.
Johnson wasn't the only one who needed some tasteful coverage, either. According to McGarvey, "Jamie [Dornan] had a cover over his penis," which must have been difficult to hide in post-production as well.
With the film's sequel, Fifty Shades Darker, kicking up production, maybe they'll save themselves the time of finding a body double for Johnson and just write in a scene where Anastasia gets a tattoo on her butt.
WATCH: Dakota Johnson Doesn't Regret Starring in 'Fifty Shades of Grey' at All