Look at you, slut. You're spent. We really have to work on your stamina before you're ready to take on the real thing. You know real men last a VERY long time. Your ass needs to be able to take a dick for at least an hour straight before it can satisfy a real man.
Aren't you forgetting something, you ungrateful bitch? Where are your manners? Why haven't you thanked the cock for fucking your worthless ass?
Give your balls 5 hard slaps.
Now get up close to the cock and say "Thank you, Master, for fucking this undeserving slut".
Go ahead and give it a nice long tongue kiss on the tip. No hesitation!
There you go. That's the taste of servitude. You're going to become very familiar with it.