He says, quote, "That's all me up there. I don't need a stunt ass."
He adds, quote, "I said, 'I gotta dance, man.' I would regret it for the rest of my life if I was in a male stripper movie and didn't get up there and strip myself."
As for that thong, Matthew says, quote, "The thong's your armor, man. It's your sword. Well, I guess it's really the sheath for the sword."
Check out behind the scenes Photos HERE