He calls his mop that because it looks as if it were a removable wig. Still not following his drift? Don't worry, neither are we. Pete explained himself to People saying, "Here's the thing about hair; I think most people think that I have Lego hair, like I can just take it on and off in one piece, and that's not quite the case - although pretty close. I refer to this [phenomenon] as Lego hair, when people think that about me."
And just wait -- the interview gets even stranger. He then adds that your hair is more important than any other part of you -- except maybe your crotch or your soul -- you know, because those two things are definitely related.
"I think hair is just, like, the most important thing about you. Besides your soul, or maybe your heart, or maybe your crotch. Or maybe the order I just put those in says a little something about who I am."
So, we think it's safe to say that we now know why he's so crazy about Ashlee Simpson -- wink, wink!