Kim and Rachel have said it all for me. The forms make me feel like me, and I have several of my wife's old bras. I just don't feel right unless I'm wearing a bra.
Now I'll add a funny PS. Even though I underdress just about all of the time, I usually don't wear forms en drab. Yesterday we were doing some landscaping work at the house with a friend who has been advising us. I'd hinted to her in the past that I CD, and thought "WTH, I'll wear my little forms under my sweatshirt." Well, at one point I was leaning over and one of the girls fell out! AnneMarie was next to me and saw it. "Uhhh .. One of my boobs fell out." (What else could I say?) She did not miss a beat. "Well, you don't want to lose one of them!" LOL.