Apparently, they were sitting boy-girl-boy-girl. I asked her if he could sit next to a boy, but she said it wasn't her decision. (I am sure there was a good reason for that decision.) I told her that I would talk to him and inform him of a consequence if I heard of this behavior again.
I don't know why SJ doesn't like girls. He is at the age now where he should be starting to show a beginning interest in girls romantically. He is somewhat behind developmentally, but the described behavior seems too developmentally behind. I asked him what was going on at lunch. "I hate sitting next to girls," he whined. "Why?" I asked him. "Their voices sound like dying cows," he responded. "What?!? Dying cows! That is mean, SJ. Mommy is a girl and my voice doesn't sound like that," I told him. "You don't count, Mom. You're an old girl," said SJ. Old girl, indeed!
I told him that his behavior towards the girls is inappropriate and unacceptable. I told him he was being mean and hurting the girls' feelings. I asked, "Would you like it if the girls said you sounded like a dying cow?" He didn't respond. "I don't want people hurting your feelings and I don't want you to hurt other people's feelings, especially the girls," I told him. "If the lunch monitor tells me you are being mean again, I will take you IPod for the night."
The next day I told the lunch monitor what his consequence would be if he misbehaved again. When I saw her at the end of the day, I asked her how his behavior was at lunch. "Much better since they are now not sitting boy-girl-boy-girl,” she said. "Well, if he starts misbehaving again, remind him that he will lose the IPod," I asked her. I am relieved that he can now sit next to a boy, but I am hopeful that he will remember his consequence for being mean.