Help! Breastfeeding problems

Pr

Does anyone 1 year old or breastfeeding baby nurse on one side and pinches and rolls the other nipple with their nails ?!? At first I was like awww they playing while eating but now I’m over it . It’s extremely painful and I say ouchhh thinking they’ll see I’m hurt and stop but no. Even harder.😂🙄 . I just put a piece of tape over it to see if that’ll stop it .

Any tips!?

My baby is 15 months