[xtiansimon]

Just a scenario I’ve experienced— You’re at the super market in one of those help your self lines. Unless the store is not busy, there is always some traffic.

Sometimes you have one or a few items, and someone in front will let you pass. (Will wait)

Other times someone in front of you has a lot and they apologize for holding up the line. You might think, no problem at all. (Is patient)

And yet others are so harried and stressed they will take every advantage offered. (Always go)

Seems there is enough variation just on personal experience. Supermarket lines could be a good simulation.