Are you a girl?

So the other day we were driving to Home depot and Cash and I were talking away... Well- I suppose I was doing all the talking. I was telling him he could be whatever he wanted to be when he grew up.... a swimmer, a painter, an architect, an engineer, a musician, a rocker, a drummer, a fireman, a lawyer, a doctor... I went on... and once I said Doctor he said I want to be a Doctor. And I said, a doctor, do you know what a doctor is and he said Dr. Chia. And then he asked me, Mom are you a girl? and I said, Yes I am a girl, and he asked "can I touch your boobies?". And I was taken a back and looked back at him in the back seat and he started giggling.... Like he knew he was saying something silly.