Define "sexual assault"

This post might seem a little odd, but look at the following article first:

A 7-year-old boy has been accused of sexual harassment after punching a fellow first-grader in the groin, but the boy's mother says he was acting in self-defense.

Tasha Lynch told The Boston Globe that her son, Mark Curran, was being choked during the Nov. 22 incident on a school bus, and has been afraid to go back to school in South Boston ever since.

“I think my kid was right to fight back [after he was choked],’’ she said. “He wasn’t doing anything except protecting himself.’’

Later in the article:

Tynan Elementary School Principal Leslie Gant didn't believe that Mark was acting out of self-defense, Lynch told The Globe.

“She said, ‘It doesn’t matter who hit who first,’ ’’ Lynch said. “‘He said he hit him in the testicles. That’s assault. That’s sexual assault.’"

I said: ‘The kid choked my son first and that’s called attempted murder. He said he couldn’t breathe.’’’

The school sent a letter to stating her son was accused of sexual harassment and endangering physical safety of other students.

In this day and age, have we come so far as to brand self-defense as "sexual assault." Does a first-grader even know what sex is? Shouldn't the school take that into consideration before even branding the kid a sexual predator? Is no action being taken against the kid who choked the accused? Sorry, but no tolerance policies continue to get more ridiculous. Show some common sense, people. I wonder if the kid even knew where he was aiming when he punched.