Actually, this is kind of an interesting thought experiment.

If I wanted to really push it, it's WAYYY down on the list. Like, the choice between losing my dick and one of my fingers; fine the finger goes. Between penis and the whole hand though? Sorry willy. Two fingers? Can stand to lose them. Three? Depends if it's the same hand. Any four fingers? Junk is back on the chopping block.

Gallbladder? Dunno what that even does, but my sister had hers out and she seems fine, so I think I would go with that. Pancreas? Yea, I would rather have a pancreas than a shlong