have been to the hospital to have my nipple checked if there is some thiong wrong i do know its noraml for guys to have these things but for me my left side had it but it was small and it went then my right side started but it did not go for all i remember it has been on me for the past 3-4 yrs and its quite big that it petrudes some times on my shirts and i cant even remove my shirt cause it looks like a small ladies breast