Hey my name is Conor. I am 15 and have been dipping for about 4 years. When i first started i did it like 1 every two weeks for the buzz. Now i dip about a half a can a day and have been doing that for about 2 years. I havent had any problems with it mouth wise. My parents beat my ass when i got caught at school twice. They are now fine with it, as long as i dont bring it to school. If i were you and your son is gonna dip, let him do it at home so he doesnt get in trouble with it. I am gonna be honest it is the hardest thing to try and quit. I now can only maybe go a day without it.