If you have to misrepresent yourself to get a phone number, do you really want the phone number?
I was joking, but it's a real problem for myself (and probably for many people on the site). I've spent a lot of time over the past 5-10 years studying, and have gained a lot of wisdom about a lot of things. There is some of it that I think many people just aren't ready to hear, or that I wouldn't feel comfortable bringing up in conversation.
I really can't imagine lying in bed with my girlfriend chatting and then casually saying something like, "so do you ever feel like your free will is an illusion?". In most cases, the illusion, if that's the real case, is a great thing, and telling someone who just wants to go get an ice cream and play a board game that they don't have free will feels weird.
In my situation, my girlfriend is actually a very smart cookie, and she's aware that I know a lot about a lot of stuff. In many cases, though, I think she doesn't ask because she doesn't really want to know.