As a woman, if a guy said to me on the first day "just so you know, I'm a virgin," I'd be like..."ummm, okay," and just find it incredibly awkward. I'm not a virgin, but I'm also not overly experienced, however, it's not something I find appropriate to talk about on a first or even second date. It's something I might bring up once I decide if the person is someone I want to continue seeing and someone I want to become physically intimate with. At that point, a discussion about experience might be appropriate. Personally, a guy's level of experience isn't a big deal to me. I think that if you can make things about the relationship and connection you feel rather than sex and levels of experience, it will take some of the pressure off.