i am 19 years old.I think I'm healthy normal guy, but, this problem has put me mentally down. I even have no hair on my chest or hands, though my friends have. I'm unable to remove my shirt in front of my friends due to the lack of chest hair. I have been teased by them sometimes, because, boys who are below my age have hair than me. Since, mustache & beard are secondary sexual characters of a male, does this mean that I'm not male?? I have no problem in the growth of hair on my head, since childhood, hair on my head grew fast. & I'm very much satisfied about my sexual performance too. But, because of this mustache problem I'm really down. Can somebody tell me why is this and is there any treatment for this?