Go all the way.

You slink sensually over to Mike and, spreading your robe, put a knee on the couch on either side of his lap, straddling him. Resting your butt on the straining erection in his pants, you lean in and kiss him, flicking your tongue gently across his, hoping to get him so hot and heavy that it wont take him long to blow his load. You don't much like the idea of Mike ejaculating in your mouth, and decide that having him cum somewhere where you wont have to taste it would be preferable. Taking it in the butt doesn't sound that great either, but it somehow seems less personal than giving a blowjob. He pulls your robe down off of your arms and lets it fall in the floor. As Mike wraps his arms around you, you lean over further and begin to suckle his ear lobe as you rock your soft bottom in his lap, really getting him hot. He You hear him gasping and feel his hands groping your buttocks. After a moment more of this, he groans, "Oh, god, I want to fuck you!" and pushes you up off of him.

As you stand, Mike stands up as well, gets behind you, and shoves you toward the couch. You hear him undoing his pants as he orders, "Pull your panties down and get on the couch." You obey his command, pulling your panties down to your bare feet and then stepping out of them. You get up on the couch on your knees, assuming the position like you saw yourself doing on the DVD. As you lean forward and grab the back of the couch, you hear Mike spit, then feel him wipe his spit-covered hand up the crack between your slightly parted butt cheeks. You hear him spit again and then it sounds like he's rubbing it on his own dick. He steps closer to you and you feel a swollen, throbbing, hard piece of meat press against your saliva-moistened anus.

Part of you almost didn't believe that what you saw on the DVD was really real, but the ease with which Mike's penis slides into you confirms that your butthole has in fact been used before. You feel Mike's hands grab your hips as he eases deeper into you. He moans a little as he begins to slide in and out of your wet ass. You grip the back of the couch tighter and brace yourself, prepared to suffer through the discomfort and humiliation until this horny man finishes using your bottom for his pleasure.

But since your hole has been previously broken-in, it doesn't really hurt. And without the pain associated with anal penetration, you notice that it feels odd, but... almost... pleasant.