[ownedbycats]

Face rubbing is perfectly normal for a cat. They have scent glands on their forehead and cheeks, and rubbing against something leaves their scent on it. They are telling the world (or at least the cat world) that whatever they wre rubbing against belongs to them. They also do it to humans they like and feel comfortable being around (or possibly to humans they consider belong to them.) Plus, having those areas scratched seems to feel really good. Try rubbing them gently and watch your cat's reaction.