"Coney", as in Coney Island, was pronounced "cunny" in previous centuries. Unfortunately, this also came to be used for a lady's naughty bits (clue: first 3 letters the same in the modern form). In a piece of nursery-speak bowdlerisation reminiscent of Monty Python's "North Minehead by-election", the rabbit-word became "bunny". That must have prevented many an embarrassing mix-up!

Steve