There it is, on the table, it is a chocolate cake, a good chocolate cake.
There is only one piece left. You want it.
I reckon there are four types of people.
Selfish
You want that last piece. The challenge is to persuade everyone else to let you have it. If the room is empty for a moment, you eat it, you have plausible deniability … you can pretend that it wasn’t you, and blame someone else. Otherwise, you have to be more subtle…. a wistful “does anybody else want..” or a confident “Well if nobody else wants…” both often work.
Self-Centred
You see the last piece, it looks good. No-one else is picking it up, so you take it. It never occurs to you that someone else might have wanted it. Why didn’t they say before?
Self-Absorbed
It is your piece. You are entitled. Nobody knows how important that last piece of cake is to you. No-one understands what you have been through nor how much you need that last piece of cake. If anyone else wants your cake, they are clearly a bad person, greedy, unscrupulous and selfish (see above). After all it is your cake.
Four types? If you don’t fit one of the above? … Darwin is not on your side.