The pleasure principle’s principle failure.

Hedonism is the pursuit of pleasure, your pleasure. Over-indexed hedonism converts altruism to a self-serving glow: loving your child is for your own benefit.
Yet, this discounts all the other motivations by collapsing them into one principle, which requires mental two-stepping. We are a multiplicity of drives and perspectives, many of which are social bonds, ideological impulses, and non-rational responsibility to others.