I'm a straight 28 year old guy and I wore a bra for a few hours
What made you want to wear a bra?
I wore a bra for a few hours to feel what it's like to have a pair of boobs
People may be surprised to learn that a straight man likes to wear women's undergarments.  But, if it doesn't impact others, it is no ones business.
I know, I feel good and it's my personal business.
Other people might be a little shocked to hear this, but I do not mind. What you do with your body is your business.