Anyone have any experience with boys with their hands down their pants constantly? He doesn't seem to be "fiddling" as such but just sticking it down the top. We remind him at home to take them out but his teacher has commented twice now that he is doing it at school. He isn't a good sleeper and I'm wondering if this is a tired thing? A comfort thing? Or just a boy thing he'll grow out of and the teacher is being a bit over the top?