Do you have kids? No! Its my bday and im 21!

Yesterday I was about to meet a friend at the shopping centre when I passed by one of those temporary promotional stands. They were trying to sign up people for maths tutoring. I walked past and they stepped out and were about to speak to me so I said, "No thank you. I'm a uni student and I don't need maths tutoring".

The guy then said, "Do you have any kids?". I stared at him aghast. I did not look like a Mum at all that day. I was wearing a denim mini and a pink top and I wasn't even carrying any plastic bags. I stopped walking and said to him, "WHAT?! KIDS?! It's my BIRTHDAY today! And im TWENTY ONE years old!".

He then went, "oh!" and gave me a high five. I then left.