That's a yes, then. Phallic or not, that flap exists on real male crabs. It looks like that. I appreciate the attention to detail more than 12-year-old "OMG it's a DICK" remarks.
It's not about details or whatever, it's weird that it was on the actual costume and has a slit near the tip. I don't care if it was made in the 70's and shocker was a bunch of nazi's but still. Besides it's not like the top half is bat bottom is crab it's left side bat so only have half a flap or something...besides what exactly does it do and why is there a need for it on a monster who's only objective is to kill Kamen Riders? Nuff said.