Lube it up by spitting on it.

I can hear you spitting on your hand and slathering it noisily along your shaft as I turn away from you and lean forward with my hands against the door to prop myself up. Once your dick is all slobbery, you take it in hand and step close behind me.

I turn my head slightly and call back over my shoulder, "Put some of that on my asshole, too."

You build up a little more saliva in your mouth and lean over, putting your face up close and personal with my butt. I feel you spread my butt cheeks with your slobbery-wet hands before you spit on my hole. You see my butthole flex slightly as I feel the warmish, wet gob splatter across my anus. You use a couple of your slobbery fingers to smear your spit around my hole and then slip one of them into me. It slides in easy, although you hear my breathing change a little when it does. I inhale sharply when you slips your second finger in and start moving them in and out of my butt.

You stand erect and step up to me, position your dick between my ass cheeks and press it against my hole. I try to lean forward and relax as you slide into me. I can't help but grunt an audible, "Uhh..." as the head of your prick squeezes it's way into my lubricated ass. As you ease your cock deeper into my sweltering hot little bottom, my breathing is heavy and focused, my head is lowered, and you hear my voice warble and moan ever so slightly. But I allow the anal intrusion without whining or complaining, taking you up my ass like a true professional.