Is there anything you're a fan of but you'd never admit it to friends?

Personally I’m a professional wrestling fan . . .but I’m also a 19 year old girl that lives in the north east so if I told my friends i think they’d laugh in my face. My friend prides herself as being a non conformist one of those I listen to bands that don’t even exist yet people. But she loves the twilight series probably the most mainstream commercialized books around, she tries to keep that fact to herself. So it got me thinking everyone probably has a hobby or an interest that they keep hidden . . . so what’s yours?