HEAD CANON ACCEPTED! I personally love this! I read another head canon that said that the reason he always wore a scarf is because it was like a "security blanket". These head canons go hand in hand, I thought.
Sherlock Head Canon - I'd like to believe Mrs. Hudson being a busy body decided to mess with Sherlock and take care of him. He'd never admit to wanting it let alone needing it so instead he dealt with her husband. If the American and choosing to fake his death is any example I doubt there are limits to how far he'd go for her. He adopted her as his Mum. <3
That would make so much sense actually. Remember that scene when John went to go stay with his girlfriend and sherlock just smiled at the smilie face (right before the explosion)? This would make that scene have so much more meaning.