@JailTheTrumps It's egocentrism. I don't mean that in the "conceit" sense in which it's sometimes used; I mean that it's inconceivable to such people that anything they benefit from isn't an unalloyed objective positive, or that anything that inconveniences them isn't an unalloyed objective negative.

And I suggest a hunting slingshot. Set you back about $40, but worth it.