Bras

Yesterday I had an new realization about bras. When I was 12, the only reason I wore a bra was because I had to change clothes in gym class and didn't want others to see my boobs. Not long after that I realized bras made it so you couldn't see your nipples through your shirt. It wasn't until I was an adult that I personally understood that bras also keep breasts from sagging. I guess I had known that already, but my boobs weren't big enough to really understand that until I was an adult. Well, yesterday I finally realized first hand why sports bras are so important. I actually don't own a sports bra and jogging was quite annoying and a little painful. I guess it's nice to know I'm getting bigger there. I find it ironically funny that I am so late in really figuring out the purposes of bras. Is there anything else I'm missing?