My sister got her nipple peirced and it looks cool but not very good if you are wearing a thin bra/top as the peircing will show through! As for breast feeding, you definately need to take it out since it is a choking hazard! But my sis had no probs breast feeding, she just popped it back in afterwards (her poor boobs must have been sore!) And there is no right or wrong side, preferabbly the side you do not lay on while sleeping (to minimise pain after getting it done) and I think staright nipple bars are nicer than hoops… If you really wanna do it then go for it 🙂 good luck! xxxx