I can understand how that would be. I am very lucky indeed to have a supportive partner who has always been there for me while I have been trying to come to terms with my developing breasts. She is considerate and sympathetic, and has spent hours listening to me as I talked through what was happening and how I felt about it. She understands that I need emotional support just as much as I need support for my breasts and she accepts that I regularly wear a bra to support them.
On another level, however, she finds it really hard to reconcile the notion that her male partner is now wearing women's underwear. She sees me as masculine, and struggles with the conflicting image that I present when I'm wearing a bra. Like Dale, I have a partner that is strongly attracted to masculinity and who likes manly men, so the appearance of my boobs is bound to have been difficult for her to come to terms with.
I do have some insecurities about this, and worry that she may come to find me unattractive because of my breasts. So far, she seems OK about it. I know that she would much prefer it if I had never developed breasts, but it is clear that in a relationship, acceptance of gynecomastia requires both partners to commit. In deference to her feelings, I try to avoid her seeing me in a bra, and that seems to work pretty well. In other words, she's fine about me wearing bras but prefers not to have to see me in one. She knows I wear them and I try to keep my bra wearing as low-profile as I can.
Strangely enough, she doesn't seem to object to my breasts and will sometimes play with them and my much enlarged and very sensitive nipples in bed. I'm not complaining at all - I enjoy this attention very much, but outside of the bedroom she would clearly prefer that she doesn't have to think about them - or my bras. It sometimes seems odd to me that me having female breasts and nipples is fine until I cover them up with a bra!
Unlike quite a few here, I have not so far been attracted to wearing other items of female clothing. I can certainly understand that those who developed breasts at puberty are likely to have generally much more feminine bodies and it makes much more sense to wear clothing that fits your body. I absolutely support the notion of wearing what works for you and not what we think society expects us to be wearing based on assigned gender.
I also believe that our hormones exert a far more profound level of influence on us that just determining whether or not we grow beards or breasts. My partner has pointed out traits in my own behaviour and attitudes which have changed significantly over a few years. What concerns me is that I have been largely unaware of them until they were commented on, which leads me to suspect that this is probably the underlying reason for the 'pink mist' phenomenon that has been remarked on a number of times in these discussions. Maybe there is an underlying hormonal imperative that predisposes some of us to cross-dressing just as it can exert a physical effect on our chests?
So far, I have not felt inclined to explore the wider world of lingerie (and I'm sure my partner would probably be aghast if I suddenly started wearing a basque or some of the more adventurous and exotic bra styles) That said, I definitely know what I like when looking for bras, and get quite upset when something I really like the look of is not available in my size. I also very much care about how I appear when wearing one - support and comfort are paramount, but like others here I also want my breasts to look their best.