There's a line -- a very clear and widely agreed upon line. It's drawn at the waist.
Guy Ramos has no regard for this line, much to the chagrin of Aron Johannsson.
Just consider this line of thought:
"Man, he's annoying. I was to piss him off. You know what I should do? I'll grab his penis. Yeah, I'll grab it. That will piss him off."
This was the real thinking of a real professional player in a real match that matters.