My breasts, I guess. I loved breastfeeding my son. We stopped when he was ten months old so he pretty much went from breast to a sippy cup and cereals and baby food.

Besides being valuable for the baby and mom breasts are also just fun things to have. Guys like to look at them. In high school I was a B cup and the guys would tell me I had 'nice lungs' LOL. Nice breasts accentuate v cut shirts. And they can be all kind of fun with a bit of imagination.