Has your man ever licked your arse?
Well he is about to now. Lie him down flat on his back and slowly lower your arse onto his face. He should know what he should be doing and if he doesn't start licking smack his balls.
As you feel his tongue I would recommend opening up your arse cheeks and pulling his head inside so that you can really feel his tongue. I am sure you will enjoy it and he will really now begin to realise he is serving you tonight.