The explanation is garbage, and will lead to persecution of the wrong type of guy.

"Key Characteristics
"Lack of Empathy: Empathy is the ability to experience within oneself, the feelings and emotions expressed by others."

First point, and you are wrong already.
Bullies excel at empathy.

Mr TerminalAutism, here is a better alternative if you must have any (they are all losers and gullible fools to the bullies unfortunately).

https://kickbully.com/

"For example, if attending a funeral, a psychopath would correctly mimic the same expressions of sadness as the other mourners, but then makes sexual advances towards the grieving widow clueless to the gross inappropriateness of such an action."

Innocent sexual advances don't exist for men. There are no risk free avenues for sexual opportunity. A man is presumed guilty of sex by misfortune of his gender. Stefan Verstappen presents a cherry-picked example, which is most likely made up to begin with, leading men to believe "There is a right way(TM)". Of course, any man is already suspect the moment he enters the room with other women.