He was just about to close his eyes again...but when Rose makes that move? Well, let's just say any concerns about proper kissing etiquette are driven completely from his mind. He splutters against her lips, going cross-eyed as he attempts to look at her.

She'll have no problem getting that tongue all around his mouth and exploring whatever she pleases. Because his brain is currently attempting to vacate the premises. It'll come back though and he'll he'll become a more active participant. Just give him a few minutes.