No, I'm pretty sure I've got it. "Hey weirdo, don't ask people to donate body parts to you in the name of medical advancements, it's creepy!!!"

Well, I'd rather ask to see if someone who has an ability to regrow limbs to demonstrate the ability and provide me with a sample.

If I just wanted to collect limbs to be some kind of Dr. Frankenstein, I would do as the good doctor had done and simply take from corpses under the cover of night.