^In regard to that, they did have sex at the hotel, it was just cut a bit short because Kiwi wanted a genuine return of feelings from Utena as well. That said it would be nice to see them become the main couple...if the manga ever returns.
^Well I guess luckily for you she can extend or retract them like claws, as part of being a werewolf. I think they're also more durable than a human's fingernails for that reason, as she's put them to some use in the show if I remember correctly.