Someone was telling me the other day that if you don't wear a bra enough, your boobs will sag as a result because of lack of support, especially when you are breastfeeding because of the extra weight. This was news to me - I have always had small boobs, so I never even thought about it. Is this true? Should I start wearing bras at all waking hours? I usually just take it off if I'm at home by myself or with my husband.