No, it's totally legit! Peter even sent me this video endorsement:
http://www.maximumpills.com/. Heh heh. There's actually an old magazine interview with him from a few years back that asks him specifically about his "ability", and he stated he thought it was normal for a long time until he attained more sexual experiences via porn/personal life, and stated that monster loads was natural for him.
Now penis stretchers....bring your surf boards, that's where the next wave is.
I really need to get a sig. An ironic one.