I have owned only one 'real bra' (underwire and cups) and I wore it maybe 5 times.
Other then that I used to wear sports, or training bras, now I just bind
If someone told me my boobs would get saggy I would probably tell them something along the lines of..
"oh good, I love dem saggy boobehs" or "I don't give a ->-bleeped-<-" or "I don't care if they turn purple, I dont want them anyway, they are a temporary disgusting body deformation that I plan to have removed soon"