Star Wars Q: What's with the cutting off of arms? (spoilers, of course)

“That’s cause droids don’t pull people’s arms out of their sockets when they lose. Wookies have been known to do that.”
“I see your point, sir. R2, I suggest a new strategy. Let the Wookie win”

Yeah-Threepio always loses his limbs! What’s up with that?

Because despite evidence to the contrary, Threepio is a dickless wonder.