As a bird owner, birds get itchy. Beards and stubble are a perfect scratching post for them to rub their faces on that they cant itch themselves via their beaks. My bird for sure LOVES being scratched in that area around her beak and near her eyes/cheeks.

Its cute as fuck either way. But im willing to bet the kiss from the dude left an irritating feeling on the birb and it was doing what it could to releive itself since it trusts him.