Over the last couple of years, having breasts really interfered with my wife and I have sex. I would get so embarrassed, it was difficult to maintain an erection. I recently opened up to her completely. I told how long I have been dealing with this. There was total shock, but mostly because I had not brought this to her attention earlier.
Our sex has improved significantly since now that everything is out in open. With her support, I know when a bra around the house, and a sports bra for exercising at her suggestion. To tell you the truth, I have learned to like having the support and no longer embarrassed in front of her. The best I could have done was to tell her about what my problem was.
Hope this helps.