Join Date: Feb 2008
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It's the raphe line. It's a normal part of all penises. It's just the little seam where the body closed up while developing in utero. It just is a bit more prone to diaper irritation than the top side of the penis b/c it can stick to the scrotum and trap gunk.
Meghan : Kayla~ 10/19/04 Jack~ 5/27/07