amotypolexia

A condition whereupon love, excitation, desire, longing, etc. causes the increased likelihood of typos within a typed communication with an object of affection, despite the subject's regularly high aptitude in spelling and grammar.

"I loe you hobneb!"
"god i eant u so badly"
"its erydifficulty to type with obe hand"

"Despite my PhD in English, the moment I step into an IM conversation with my lover, I'm completely overcome with a case of severe amotypolexia."