Wow, today I just realized my right nipple is slightly inverted! And all along I thought that's how a typical nipple should look like till I googled. The interesting thing is, the left one is perfectly normal, yet I always find the atypical one nicer. Haha. For your information, an inverted nipple is one in which it is turned inside instead of pointing out. It looks just like an indentation in the middle of the areola. It probably just makes breast feeding harder but that's all about it. Not my concern since I'll say no to breastfeeding and rely on formula milk if one day I finally decide to have kids. And it is possible to train it to turn out too. Just a simple hand massage will do.