When's the last time you saw ANYONE in boxing kiss an opponent in the middle of a fight?
Was he trying to be cute, "Here, I'll kiss it and make it all better?" or what? The headbutt was not an accident, he launched himself up full body leading with his head and there are several video clips for people to review if they want to decide what they would have done as a judge.
Here's a nice still image of Ortiz's headbutt. Tell me looking at this he is trying to box.
"Mayweather, ahead on two scorecards 3-0 and the other 2-1, outlanded Ortiz 73-26." when the fight ended with the knockout.
I've never boxed. I'm good friends with a Golden Gloves boxer who said Ortiz touched gloves and at that point, you better be prepared to defend yourself.
Ortiz screwed up twice, first was the headbutt, second was lowering his gloves for no reason.