I'm possesed!

I've just come to the realisation that everytime I write e-mails I am possesed by somebody's Nana! I use all kinds of old fashioned terms that I'd never use in 'real life' conversation. Only just today I have caught myself typing in 'my dear', 'pet', and 'what a silly duffer'.
I'm not sure if it's my hands that are possesed or my thoughts. If it's my hands I'm sure I can in future dictate my e-mails to someone else to type then I'll be fine. If it's my thoughts that are possesed I'm in trouble.