When i'm losing pounds i might do chest presses with the weight machine...keeps them a little bouncier. I have struggled with the issue of breasts for years. Keep thinking of getting plastic surgery on them when i'm feeling really really low. but I haven't gotten it yet, and H doesn't complain. They are too small for my tastes, but he says they are fine. I wouldn't worry about it--there are probably little things HE could be obsessing about his own appearance too, but you love him like he is
Im trying to figure out how intimacy works and being like present during physical moments, and I think that during intimate physical moments, it's supposed to be more about the intensity between two people, and the feelings and all that. If the couple can focus on loving each other (and get out of their own heads/insecurities), supposedly it's blissful and neither cares how they look, according to societal standards.
I haven't mastered this concept yet though. good luck with your struggles.