Speaking as a person with practically no bosoms a very small bust, unless I wear either gel bras or air bras I hardly make a break in the fabric of whatever top I'm wearing.
Take the bra off, and the breasts go with it!
Still, I suppose what was never there can never droop.
Happy memories of when I had the DS's. Once the boob fairy had been (oh, I remember it so well! That turning over in bed and where ones arm would usually drop down onto the bed, it's fall was impeded by a newly arrived bosom!) I would spend longer in front of the mirror than was strictly necessary. 
I would have loved to be able to keep them, but sadly they returned all to quickly to their pre-baby state 