Oh the horror!
:-P favicon just looks like the
:-D emoticon but with a red mouth.
:-P - :-) - :-D
Now we all know that mouths already look red, so this isn't sufficient to distinguish the tongue-sticky-outy emoticon from the smiling emoticon.
The key distinguishing feature of the
:-P favicon is the asymmetry of the tongue placement, in my scholarly opinion.
This must be remedied! The fate of the entire WP community rests on it!