Maybe it's good luck for procreating, since rabbits are known to be specialists at it.
Also people like to carry a rabbit's foot for good luck--where did that practice come from?
If the rabbit lost his foot and it's in your pocket then it doesn't seem like it was very good luck to the rabbit to begin with!
Who knows maybe it's the Easter Bunny?
Honestly, aside from Bugs Bunny
What's up Doc?
And the cereal commercial about:
Silly Rabbit, Trix are for Kids!
I'm not sure who needs a six foot pink rabbit anyway. ;-)
(Credit Photo: Andy Blumenthal)