At least you can approach them.
I honestly have -never- approached a girl with intent to further anything.
So. Pathetic.
And I'm 25. Wtf ._.
I'm 27 and haven't ever approached a girl, either.. I'm even married and have a son. I basically spent my whole life waiting for the girl to say something to me, or make the first move... Probably why I've had so few relationships.
There was never anyone to give me 'that talk' when you find that first girl you like, no one to push me into getting over my fear and talking to her... So I just never did.
To further compound the problem, I am -extremely- shy, regardless of sex. To the point I'd rather just walk out of the store if I can't find what I'm looking for, rather than ask.