Yes, sex can be intimate and loving, and perhaps pictures we may take of "the act" should be kept private.
But cuddling a baby close and smelling his newborn hair smell is also intimate and loving. By your logic we shouldn't be taking pictures of this?
I'm sure many ff mums (and dads) would say that feeding your baby from a bottle, snuggling with him and hearing him gulp down his feed, breaking off occasionally to smile at you, can also be intimate and loving. Do you have a problem with pictures of bottle feeding a baby?
As for pictures like this being around forever... well, I hope that by the time my son is grown, breastfeeding will once again be considered one of the most natural things in the world, and there will be pictures of it everywhere, women will sit in the street bfing their baby if they are hungry and no one will bat an eyelid. So pics of him being bf by his Mum will not embarrass him at all...
.... well, not any more than any baby pictures embarrass older children and teenagers / young adults, anyway!