I cannot understand selfish behaviour, to me it a very ugly trait.
But then I find things that others don’t consider to be selfish to be selfish.
For example, at work, sitting around the table at break time, every one gets up to leave, one on the end just leaves their chair out and walks off instead of tucking it in.
No one can get passed until the person next to them pushes that chair in.
That I think is selfish behaviour.
Those who do not ever work as part of the team. They do what they need to do, never offer to help anyone out no matter how they appear to be struggling. If they ask for help, others come forward, never them. Yet they expect help from the rest of the team always.
I don’t think that there is any thought in it at all.