To that end I'd like to refer you to the website us.parsimony.net/forum27099. This forum, which isn't linked to these dance sites, is commonly known as "ballet fetish," and there are a number of pretty nice guys (and some gals) that post there about their sexual interests in dancewear.
Why don't you get that ballerina g/f of yours to take you to a ballet class? (Get a dancebelt first!) It's great to be able to wear dancewear in public!
Have (safe) fun! BalletMaster[/i]