I asked a friend who is into comics this same question years ago and was told that when Hulk ripped Wolverine in half and tossed the lower half up a mountain, the upper half had to crawl up the mountain to rejoin with the lower half in order to heal. Not sure if that's accurate so feel free to correct me, but that's what I was told.
OK so what if Wolverine cut off his dick, and grew a new one back quickly, could he then cut off the head and attach the old dick to double its length? I'm wondering if he could extend his dick infinitely that way... could be a new superpower of the long dick whip weapon, terrifying to many of his enemies