So we were out shopping yesterday and the whole time we were checking out Emma was smacking her lips....REALLY loudly. The cashier said that is cutting a tooth. HUH? She is only 3 months old. I have not noticed a single one of the "typical" teething signs and since she is nursing I would have imagined I would be the 1st one to know

Neither of my other 2 kids got teeth this early but then again every kid can be different.
Anyone ever heard of this? Is it another one of those wives tale myths or is there some truth behind it?