I guess I'm weird being so young here, but it is great seeing other people accept having breasts.
For some reason I had a women's puberty, and started developing breasts at just like the girls in my class. And like women, they kept growing through my teen years. My parents were in denial about it, but when I was 14 my friend suggested I wear a bra—and she was right. From that point on, I wore a bra essentially full time. Before I wore a bra I was bullied and told to 'wear a bra'; once I started wearing a bra, I was bullied for wearing a bra :/
Anyway, by the time I graduated I was 34DD cup. Now I'm a 36E. Putting a bra on is second nature for me—sports bras for exercising, soft cup for everyday wear, underwire for getting dressed up. And I have fat deposits like a woman, so I'm much happier wearing a blouse or women's tops than male clothes that don’t fit.