@WhoopassGirl I see it like masks on a plane, you have to take care of yourself first and it's natural to want to. It's healthy to.
Even at the point of wanting, all that matters is what you do. Selfishness is a behavior rather than a mentality. If you and someone else are hungry and you've got one bit of food between you two, it's normal to want the whole thing, but whether or not you would share determines selfishness.