To make it explicit for those who haven't tasted it, mother's milk tastes distinctly sweet (literally), in a way cow milk does not. So yeah, there's a probable

To make it explicit for those who haven't tasted it, mother's milk tastes distinctly sweet (literally), in a way cow milk does not. So yeah, there's a probable purpose for sweet receptors. An interesting question is whether seeking sweet foods in modern adult life, which would probably not have been available in our evolution, guides us to a healthy diet.