Because its not that important issue and has nothing to do with her chastity ..also i know similar cases that a husband or parents was against piercing but when the woman/girl did it nothing happened at all and they accepted it ..
So, they became more open minded 🙂
In case that he ll ask for this she can say no or just put it off only when she's naked in front of him..
Vanessa I get pleasant feelings,but can't orgasm this way,so it is very frustrating for me...
So its better wearing the bra because you don't get frustrated so much 🙂