Why don't they listen?

Why is it that boys don't listen? This morning before school the boys (Crue, Reese an Tieg) were running around playing swords and I told them several time to stop because someone was going to get hurt..........and what do you think happened? Yep.....one of them got hurt and had to go to urgent care. Poor little Tieg ran into Crue and hit the tile floor face first, knocked out his already loose tooth and put a nasty cut on his upper lip. Luckily, it was on the inside so it did'nt need stitches but probably would have if it was on the outside. He just has a very bad cut and a big fat lip. Tieg said..."Mom, why does this always happen to me?" It's not the first and definitly not the last, but I just wish they would listen to me!