Re: One Piece discussion (Spoilers)
I took the Yami Yami no Mi's ability into consideration while I was pondering. I'm sure that his darkness powers had something to do with the Gura Gura no Mi's extraction. Teach did say that his fruit was "unique" even for Logia.
Though, what I posted could be possible too because we haven't seen Dr. Vegapunk yet. From what we know of him he's the authority on Devil Fruits and of course Teach hasn't revealed what he actually did under that sheet.
...and one a side note, I kinda hope Sanji gets over these over exaggerated nose bleeds. I only found it funny the first time. Poor guy, being an amorous straight man on an island of gay, cross dressing men without a woman in sight....must have been truely "hell".