Do I really look 17 ?

I took Titan to the docs today but his regular pediatrician was out, so we had to see the other doc in the clinic. Well Tayven and Trenton were outside playing with a friend of ours and his wife was in the office with me. So after the doc checks him out and stuff, I hear the boys playing through the window. I turned to my friend and said "I hear my kids". The doc looks at me and says, "How many kids do you have?" I said, "3." He says, "3 kids! and I thought you were only 17." My friend laughed and said, "close." The doc says, "How old are you?" I said, "21." The he said, 'Oh so you started at what? 4?"  I told him, "Well let's just say I started young." lol... So do I really look only 17? If so, I must look ridiculous when I have my 3 kids with me hehe. I must look like their babysitter or something :P