@matt675 My son is 10 and does this every now and then. It's a youtube thing and if he doesn't get it from youtube he will get it from school. You can try to stop it but if all the other kids in school are doing it he just won't do it at home.
@mrfuture I personally don't care that it's aluminum free but figured it might be useful info. I use that one because it's the gel type. The white kinds give me a red rash.