This guy was unsure about the difference between mansplaining and being a dude explaining a topic, so he turned to r/AmItheA**hole for advice. Many women have experienced mansplaining – depending on what circles you're in, it might happen all the time! But for this 15 year old, he's been accused of something he doesn't think he did. As he writes, the OP, Ellie, and Mia are all in a class together. He and Ellie study together during and outside of their physics class, as he recited parts of the…