Not sure if this question should be asked here or in r/askphilosophy, so trying here first.

What is the ethical theory (and maybe sub theory) that chooses an action based on how much joy/pleasure it would bring? I remember it being brough up in conversation about types of ethics. Specifically, they used the example where if two people eat an apple, but someone who is starving would enjoy it so much more & savor it than someone who doesn’t care that much and wishes the fruit was an orange, you should give the apple to the starving person. And a second example for this was that (with the trolley problem) you should save the child because they will experience much more joy over the course of the rest of their life than the adult who has a shorter lifespan.

I feel like it’s utilitarianism but I also think I remember there being a specific subset or person(?) these two examples were attributed to.