Except when the girl is hot. If you're into Gothic, cosplay, fetish or stuff like that, you've seen incredibly hot girls with crazy hair/nails/shoes/whatever. If not, you're missing out; there's a lot of creativity out there.
I never got why painted nails were attractive... but if it makes you happy... I do paint my toe nails... but I also wear novelty socks. I don't think my penguin socks turn anyone on either.
Nails