"Oops..." he muttered as he chased after it. Reaching the bottom of the stairs, he found Charlie waiting there to greet him. "Hey, boy." Lincoln said to him, patting his head. "Seen my toilet paper?" The pitbull merely looked at him as Lincoln dropped to his hands and knees, looking around and behind the plant stand, then crawling over to the hat stand on the other side of the door.
"Aha!" he exclaimed, finding the roll. Backing up so that he could pick up the roll, he pushed his bottom back toward Charlie's face. Curious, the dog brought his nose closer to his master's butt and lightly sniffed. Tentatively, he stuck out his tongue and gave the pink valley an exploratory lick.
"Whoa!" Lincoln yelled, jumping up in shock from the wet probe. Charlie leapt back, frightened by the response. Lincoln was flooded by a myriad of unfamiliar and confusing sensations, and he became aware that his penis had jumped to a semi-erect position. Indeed, his whole crotch and butt tingled from the experience.
For a long moment, he just stood there, trying to make sense of what had just happened. Had his dog just done what he thought he had? Lincoln had to admit the sensation was not unpleasant. Curious at the response it provoked, Lincoln looked at his faithful friend.
"Do it again, boy!" Lincoln asked him, turning and bending over slightly. Charlie cautiously trotted over, sniffed him, and greeted his master's anus with four slow licks with his warm, wet, rough tongue, each one sending a dizzying rush of pleasure up his back. Lincoln's tool was standing at complete attention now, and his pet gently nuzzled the side of his master's bare leg for approval.
"Good boy, good boy." Lincoln praised his dog as he woozily sat down on the stairs, legs spread, reeling from the unbelieveable waves of pleasure rippling through him. He lovingly stroked the fur on his dog's head for a time, before setting his hands on the steps.