I have three nipples. I’m not proud of them, but there they are. Resting a few inches below my right breast, my third nipple (also called a supernumerary nipple, accessory breast, multiple breast syndrome, mammae erraticae or polythelia) was first pointed out to me in the sixth grade when I took my shirt off during a heated kickball match. At the time, it was about the same size as my female classmates’ nipples, so I was a little self-conscious about it. Since then, I’ve just accepted it and been glad it hasn’t grown any larger. As it turns out, having three nipples is more common than I originally thought. One…