I was talking to a girl and she randomly goes, "You've never touched a woman before have you" or "You've never been on a date have you".

This is what they call a "shit-test", it's meant to throw you off your balance and see how you react, woman do this kind of bullshit all the time. If it's a woman you are actually trying to date who is doing this, it's better to reply with some kind of dismissive joke like "I did once, but the doctor cut my cord and slapped me in the ass after that so I got kind of traumatized of the whole experience". Or if you don't give a fuck just say "Oh, I saw a man trying to rape a girl once, I decided to help, she didn’t stand a chance against both of us" lol