You keep finding ways to adjust your grip around your slick, red, bony shaft and watch it swell and darken. You remember Jason coming to dinner one time and mentioning having to do semen collection on his dogs. You thought it wasn't very appetising dinner conversation, and you told him so to his face. At the time, you couldn't imagine how a human could grab an animals genitals and bring it to orgasm without throwing up. You realize you might now already be more of an expert than he is. Every stroke is a discovery for you, an experiment in bestial pleasure. You pretty much knew everything about how you could manhandle your old dick. This one is like unexplored terrain.
And frankly, you're almost disappointed that this alien organ rewards you for finding its weak spots like this. It means you're actually going to have get used to feeling what a dog feels, and maybe even learn to enjoy it! You think you would have probably stopped jacking off already if you weren't smelling your own sex hormones and also Bella's from across the mansion. You definitely wouldn't have done this in front of a human, much less your own father, if your canine instincts weren't already kicking in or if they're was any hope left of him actually changing you back. There's nothing left to lose by waiting, and a whole bunch of familiarity to start gaining if your stuck with this anatomy. You'd never admit you enjoy this new member as much as your old one, and so far, you don't. Sure, it's great, but it still feels like its building up to something you haven't felt yet, something better. And that's when you see it: the knot. At least, that's what your father says Jason calls it.
"You say I'm gonna have more stamina, old man?" you ask bluntly, not sure how to even feel right now but glad to sound defiant.
"Yep, dogs can last for quite a while, or at least that's what Jason says. They don't really have a choice in it, either. Apparently, that round thing of yours makes it work."
Well, it's now or never, you think. You still aren't sexually relieved yet and you're going to need something more than you've already done if you want to get this sexual energy out and try to ignore the sexy smells in here. Still thinking it looks like an injury, you clench your teeth and lightly tap your swollen area with one finger. Hmmmm. Not bad. You wrap some more fingers around it and hold it very gently, still a little nervous about possibly hurting it. You bite your lip. This part is at least as sensitive as the head was on your old cock! You quickly learn that pressure feels good on it. Soon you're moaning and squeezing the knot with your whole hand around it. You start automatically thrusting into your hand like, well, like a stud dog jackhammering into a bitch. A hard spasm overtakes your loins, and your whole body flinches once in ecstasy from head to tail. You stiffen up and fel a pressure building in your crotch, which jets right out your dick as streams of cum. You close your eyes in bliss, and somewhat also in shame. You don't want to think about the fact that you got the job done with an animal's cock instead of a human's. You just want to lose yourself in this well-deserved and rather spectacular orgasm.
You are totally zoned out and lost in bliss at first, and after a little while, you realize it's not stopping. You manage to calm down a bit but can still feel the pleasure coursing through your knew member. Your hand starts to ache a little from keeping the pressure up against your swollen knot, but you wouldn't let go of it for anything at this point. You finally look down at the bloated dick that's given you the longest and most addictive orgasm of your young adult life. It's still hideous, but all you can do is grin stupidly at it.
Then your ears perk up and you raise your head. You're hearing click sounds. You look up and see your dad snapping photos with his smartphone.
"What?" he says, "I gotta have proof if I'm winning the bed. Besides, it's not like dogs get privacy anyways."
Your ears droop. You look down again at your twitching red shaft. You're starting to hope it will finish up soon a hide itself back down in that sheath, which is the most privacy you're going to get from now on. Still, your tail starts wagging a bit at the thought of pleasuring this new organ again some time.
You try to say something, but you're a little surprised to find it doesn't work. Your tongue flops out of your mouth and you make a noise, but you don't manage to form words that anyone would understand. You finally take notice of something dark in front of you and reach up your hands to feel your face. Shit! Your nose and jaw are stuck out so far that you can wrap an entire cum-soaked hand around what is obviously your new muzzle. You try to shout through it but it sounds more like a loud bark!