...did he put a hefty bag over his dick?

What are you talking about? They're at sea, aren't they? It's got to be pitch.

seems to be sanji's left leg - nothing else.

Actually, I think it's Brook's leg. Pretty sure this is based on that time they were fighting the Flying Fish Riders, and Nami and Franky had to save Luffy Brook and Chopper from drowning.

Heh, Mistook Nami for Misty in the thumb...