What was i thinking?

I've gone to watch the snowflakes high school volleyball games twice this year. When you walk into the gym you have to pay. So the first time i paid and the lady said, "are you a student?" I was a little surprised and then felt pretty good thinking that this lady thought i was a high school student and i then replied, "No, but you are so kind for thinking that." I then walked into the game and sat down. I told my mom and my aunt Sherri what the lady said i was kind of gloating and feeling pretty good about myself. Well game two. I walked into the gym and gave my money to the lady she was about to stamp my hand and then asked again, "are you a student?" I was thinking again how sweet i must look really young to her, but then she said, "dear you only gave me 4 dollars its 5 for adults." I'm such a dummy! So i paid her the extra dollar my mom was standing right by me and started laughing. I knew i wasn't going to let this go with my mom knowing about it. Next time I'm making sure i have a 5 dollar bill. So if you want someone to tell you your young go to a high school sporting event and give them the wrong amount of money so they can ask if you're a student. What was i thinking?