"Biting is about putting a part of someone else's body into your mouth, and that is cannibalistic. That's not to say that everyone who bites is a cannibal, but on a deeper psychological level; it's about cannabalism, and that's why we find it so shocking.. If we were to rank it among all the crimes, cannabalism is about as big a no-no as possible" ....
.... or perhaps Luis would prefer -
"In evolutionary terms, there are many animals who bite their mates as a way of controlling them before engaging with them sexually." ...
or -
"It is nearly always a form of sadism.... To get to the root of the problem and address it effectively, he (Luis S) requires psychological therapy."
etc. etc
see todays NZ Herald : Opinion, p. A33, under Headline 'World Cup Chomp.' (full page article reprinted from UK Telegraph)