Ah, so there's a mathematical reason for paedophillia
Seriously dude, if the base was not mentioned when it was known why was his marriage to Sawda bint Zama recorded as her being 5 years old not 55? I think you're trying to hand wave away an unjustifiable and reprehensible action on the part of a man who was more likely mentally ill rather than inspired by god.
As for Draw Muhammed Day, if it offends 1.6 billion people, well, fine. You're allowed to be offended; you're not allowed to perpetrate violence against people who offend you though. If muslims quit with that crap then people won't be bothered to draw Muhammed. You're being trolled on a cultural scale because lots of us don't want to put up with religious violence anymore.