Touching is good. It’s a display of endearment, a bonding behavior, an affectionate act.
Touching is bad. It’s a display of aggression, a divisive behavior, a violent act.
Contrary to popular belief, referees are people too. They like good touch. They don’t like bad touch. On Sunday, Cristiano Ronaldo did a bad touch. The referee didn’t like it. Ronaldo is suspended five matches.