What have I done

The other day I'm sitting in debate class and we're talking about kids and when they mature. My teacher brought up the point that all kids mature at different times. He gave an example of his wife, who didn't  start having a period until she was 16. That in and of itself was a bit awkward, but not too bad. He goes on to say, "I know, all the girls here are going, 'What?! I started when I was like 4!'" Of course, all the girls in the room start to laugh knowing full well that it's basically impossible to go through puberty at that age. Me, always repeating everything funny that I hear, scoffed and said, "I started when I was 4!" Just then, the little freshman in front of me turns around and gives me the most horrified look I've ever seen in my life, thinking that I really had started when I was four. I just stared back at him, not really knowing what to say. Yeah, it was just a freshman, but the senior boy next to him was pretty fine looking, and if he was anywhere near as ignorant as the freshman, he also thought I started puberty at age four. So there I was, sitting in debate class, everyone uneducated thinking I was some kind of freak of nature. I didn't know how to explain to them that I was just repeating what the teacher had said. All I could think was, "What have I done."