Mark had to open the door to let in Aidan, who was still acting like he had paws and couldn't really grasp anything. The gay naked 28-year-old sauntered in on all fours and turned on the TV with by tapping his "forepaw" on the remote. He laughed at one of the comedian's jokes and looked like he was about to plop down and watch the rest, but instead he glanced over to Mark and jumped when he saw Mark grinning at him from the doorway.
"Heh, what is it, Mark? You look like you're watching me instead of the telly."
"Oh, no worries, I'm just happy to see my roommate enjoying himself," said Mark with a mischevious look.
Aidan immediately raised an eyebrow. "You've finally thought of a change for me, haven't you?"
"You could say that," mused Mark, marveling at how dog-like his new pet human was becoming already, and how oblivious he was to the earlier changes which seemed normal to him now.
"Well, come on, out with it," said Aiden, stepping up to him with an expectant look on his face.
"Well, I think you ought to start wagging your tail when you're happy from now on, especially when you're happy to see me, like the proper best friend you are. And wouldn't it be cute if you would literally tuck your tail between you're legs when you're scared?"
Aiden snorted in derisive laughter. "What, like a dog? That's ridiculous. Whatever gave you such a silly idea? I don't even have a--" Aiden gasped and Mark tried to hide his giggle as a long, bluntly pointed appendage spilled out from the top of his roommates butt crack. Aiden looked very confused, like he was trying to figure out something. Mark's grin grew wider as the tail started moving around a bit, unseen by Aiden, whose eyes widened.
"I feel something..." Aiden's voice trailed off.
"...moving behind you?" Mark finished his sentence for him.
Aiden's head whipped around toward his rear end in less than a second. He gasped when he saw it! Just as Mark had commanded, the thick, expressive limb was fully Aiden's to employ. It had picked up on Aiden's startlement as quickly as his lungs received the signal to gasp; his own muscles craned down in between his legs and left it hanging almost to his "paws." Seeing it disappear down over his bottom, Aiden lowered his head between his arms to get another look at the new extremity he'd been given. As the distressing realization set in that his roommate truly wasn't above reducing him to the level of a common housepet, he felt his tail tuck tighter underneath and watched it happen. He flinched when he heard Mark speak again.
"Why are you staring at your own tail like it came from space? Did you think it would look any different than it did yesterday?"
Mark had been counting the seconds and new it was time for the selective amnesia to kick in like with all the other changes. Sure enough, Aiden looked confused again. Why HAD he been staring at his tail? What was he looking for? Something still seemed strange to him, inwardly begging for him to notice something, like the puzzlement of one who has gone into a room and forgotten why they were there. Still, he lightened up and laughed at his friends' sarcastic quip. Mark always knew how to snap him out of a crisis. His tail swished back and forth.
Mark went over and sat on the couch and watched Aiden plop down in front of the television. They both had a great time watching the stand-up routine, and Mark had a great time watching Aiden act like he had always had his new canine appendage. It was still hairless and looked like human skin, but it was just as responsive as a dog's tail, flailing wildly with every guffaw. Mark was looking forward to having the dog he always wanted. It was just a matter of time now.