I can understand how there are health benefits to this, breast milk obviously has a lot of nutrients and is very healthy. However, physically breast feeding your older toddler+ is weird. I have no problems seeing a mother breast feeding a baby or even a young toddler. But I have witnessed a mother feeding a five year old like this and it was awkward as fuck. In my opinion that child was too old to be sucking his mother's tit like that. It just seems perverse to me and I would almost say that breastfeeding above a certain age should be considered pedophilia. If you want to breast feed your older child and they enjoy that then use a breast pump, pump the milk out and then give it to the child. They will still get the nutrients that way.