Fall Out Boy bassist and published author Pete Wentz is pretty familiar with 'Fifty Shades of Grey' -- his own latest novel was mistaken for it, and he references it when talking about his newly reunited band!

Wentz explained that part of the conditions of Fall Out Boy's reunion was that all band members had to have an equal say on all of their new material -- no Christian Grey style domination here.

"One of the cool things about coming back was that we decided everyone has to be in on every idea, or else it's out," he told MTV News. "We did ten songs, maybe there will be eleven songs on there," he said. "We have other cool ideas, but we're definitely not in that part of being in a band where you're like 'Oh, well, this dude likes this song, so I guess we'll put it on the album, and we'll probably never play it and nobody will care about it,'" he said. "That can happen; and so it feels so good to be so far from it. We're having the reunion sex, so like it's so awesome that we don't have to bring in the whips yet."

We see what he did there!

Also enjoying the "reunion sex" rush? Fall Out Boy fans.

"When we got on stage in Chicago, it was crazy. It was a rush, because we honestly didn't think people would care, and that's the truth," Wentz admitted. "But it felt like we didn't miss a beat. It's so early in the process and things are happening so much faster than we thought; the first time you do things, there's no instruction book," he explained. "It's not like 'Oh, okay, you shouldn't act like an idiot.' We're all more appreciative and we've all grown up a bit. It's cool to do Fall Out Boy as Fall Out Men."

As for his novel, which hit shelves last week hot on the heels of their reunion hype and NBA All-Star performance with 2 Chainz, Wentz has had some awkward situations stemming from confusing his book with the raunchy S&M tome.

"I showed up at a signing in New Jersey yesterday, and this lady was like 'The author of 'Fifty Shades of Grey' is here?'" he chuckled. "I think that might have been a little disappointing for her. But I told her, 'Don't worry about it, there's just as much illicit sex in this book.'"