Your girlfriend's pants : Non-stick, double or more layers.

Put them on the screens of ur pdas, computer, even TVs? To screen from obnoxious prying hands but not if mutually acceptable ... current anti-stare/glare coatings also retain virus (oi!, dirt, dust, whatever, eg in conjuctivitis) ... must treat at once else develop permanent affinity for or against them (mutual damage) ...

Moral of the story :

Better do not get a sticky girlfriend and end-up staring at one another, not with mutual love but with mutual destructive tendencies ....