The subject of wearing a bra as a male is and can be difficult for most. As stated before that's not how we thought of bras. We liked the fact that those we were attracted to had them, not us.
As my breast developed it took some serious brain rewiring for me to try one. For some it may come easy, others a longer period of time to gain that acceptance. And that's okay. We all have different social norms and pressure's around us, and, friends with various opinions on the subject that we still want to have contact with despite their lack of understanding on the matter. When I began wearing it was strictly one of wearing a utilitarian bra. Plain and nondescript. Today I wear anything. I like wearing colors, lace and what ever else is flattering. One that makes me look good, feel good about myself, is comfortable in various weather conditions and activities. I'm still a man and I can wear shades of pink, hides under clothes well, and lace.
It's just a BRA.
Fabric sewn in a way to provide the wearer comfort and style.