Do all three of your grandkids say they got this mis-information from teachers or, if not, from whom they got it?
My granddaughter is the oldest, 6th grade, and she is the one who is so upset by it. I asked her today, where she heard that, and she said that is what they teach in health class. She's in the Arcadia Middle School, in Greece, NY.
When I asked if they taught that in the health classes for the other grades, she said she thinks so. I didn't ask the two younger kids, because the youngest one isn't ready for a question like that, and the middle one is really good at figuring things out for himself. He would just brush the whole thing off and not want to even talk about it. He would be one of the kids who would probably tell the other kids it wasn't true, and would just ignore it when the teacher said it. At least I know for sure that the health teacher at Arcadia is teaching this, and the school may very well be condoning it. judging from some of the other garbage they are teaching the kids.
Don't get me wrong, in general I really like their schools in Greece, but they have a very liberal bias to them, and like to feed it to the kids. Some of it involves industries people here in Maine are dependant on, like fishing and lumbering, and their views about what these industries are all about is totally off the mark. I just wish all schools would stick to teaching kids the things they need to know to make a living and have a career, without filling their heads full of things that they really know nothing about, and things that aren't going to help them be successful adults.