I think we have, like, 3 other Bayonetta topics scattered around these boards. Not that I'm complaining; the more love the game gets the better. Anyways, I think I mentioned it before, but if you tap the lock on button she blows a kiss to an enemy that "stuns" them for a split-second. I found a combo video that showed her doing it over and over to keep her opponent stun-locked but I can't find it, now...
... however what I did find was the prototype of Bayonetta, which shows her doing it as well. The kiss is emphasized more in the prototype then in the real thing. In the retail version if you blink you'll miss it. It's more of an easter egg, really. Speaking of easter egg, check out 5:10 of the prototype video...