Why does stop not get through his head

Erica

My bf keeps grabbing my boobs and not even in a sexual way, actually it’s more of him just lightly smacking/shaking them around. He does it every day multiple times a day and I keep telling him to stop and pushing his hands away. He just won’t stop. It doesn’t help my boobs are fairly big, which I dislike anyways. They also hang lower than I’d like. I swear I’m going to start wearing a binder or something I can’t stand it anymore!