My friend who is also my son's girlfriend's mom, told me that his girlfriend thinks he is using meth because his teeth are yellow (he smokes sometimes) and are messed up. I don't know what that is supposed to mean. I just saw him today and didn't really notice his teeth. They apparently broke up over it. He smokes marijuana and I think he does something else. In the past, he has done all kinds of stuff. I am very concerned about this.