Don't all scoff at once, but...
have a quick read of this.
Again, I stress I am not condoning this sort of behavoir on a football pitch at all. Luis should get a ban for doing it again. But just entertain for a moment the possibility that it could be some weird-ass neurological thing that he suppresses most of the time. Even if he was diagnosed as such, you can't do that in a sporting contest, or in any social context really, but it would be an interesting development to say the least.
And I'm not trivialising conditions such as Tourette's, or trying to find far-fetched lame excuses for him - it could well have no relation to anything whatsoever, just childish impulsive nobheadery on his part. It's most likely that, even. But I'm genuinely intrigued as to what makes him do this in particular, when the only ones who really suffer are himself and his team. I don't accept that he just does it because he's 'bad'. I really need to know now.