If you see somebody described as "he's just like that" or "he can't help himself", ask if he's like that when he might be held accountable. E.g., in front of his boss, his mom, at church, when a video camera is recording.
Occasionally, he really can't help himself. But it usually turns out that he can, and that there's a pattern to when he can't. E.g., he's a jerk to juniors and peer women, but perfectly controlled in front of his male boss. That's when you know it's not illness, it's abuse.
