It’s really an amazing adaptation, to have an anal sac that you can express at someone when they get annoying. Think what human civilization would be like if we had that ability.
Being a politician would be less rosy than it is, now.
This guy’s just a baby. He was grubbing (literally) around in the field when I saw him and wandered over. They have pretty bad vision, I think, or he was just not worried about humans, yet.