"I'm so happy you like it! I can share some more with you, if you want. Oh! I can also show you how a dog boy like me likes you!"
"Sure! I like you too, Puppy!" Johnny says innocently after messily removing the slick tennis ball from his mouth.
With that, Puppy comes right up to his face again, pushing his half muzzle to Johnny's face before lathering it with a tongue bath.
You chuckle as Johnny sputters in surprise, clearly unexpecting his face to be wet like in an affectionate dog-like manner but giggles happily at the showering affection the dog boy is showing him. After a while, it doesn't occur to you or the audience that the situation seems off when Johnny begins to eagerly lick and swallow as much of the doggy drool on his face as much as he can, even when he begins to lick back in reciprocation. If anything, it makes everyone drool a bit more and breathe heavily, though none of you knew or cared why.
The human and dog boy hold each other's hips to steady themselves, both of them just as unaware of the changes the strangeness of the situation as the audience was. This was apparent even more so when Johnny's face began to push out slowly into a half muzzle like Puppy's, perfectly accommodating for his new dog nose, and his upper lip separating down the middle into a canine split with small divots forming symmetrically on each half. And like with his nose, the audience's faces began to push out into half muzzles as well, with all the same features. You don't notice or even feel the changes, though you had a strange feeling in the back of your head saying that everything was becoming 'normal' to you.
The scene still continued on for a few more minutes, now focusing on their tongues as they wet each other's half muzzles. But soon their movements shifted as they began licking each other's tongues openly. At first, it was sloppy due to their different tongues. Then Johnny's tongue began to change as well, with every lick flattening it and becoming longer. Drool began to flick off more due to their growing friendliness towards each other creating more saliva off his new tongue until they were now in perfect sync in their licks.
Meanwhile, your own tongue felt a bit uncomfortable in your mouth, as though it were bunching up to much from your excitement of the film. You didn't want to embarrass yourself in front of your girlfriend or the public, but you decide to risk it anyways and let your tongue loll out of your mouth. If anything, if felt more right to do so even if your drool was dripping onto your shirt and it even felt cooler as your heavy breathing turns into canine panting. Against your fears and attention, though, your girlfriend and the rest of the audience began doing the same for the same reason and out of instinct, the entire theater now laden with the soft pants of the audience as you all hang your drooling tongues out of your canine half muzzles.
Johnny and Puppy soon separate, causing the you and the audience to laugh when they had messy strings of saliva still connecting their half muzzles.
"Wow, Johnny! Your drool tastes good, too! And you must really like me too with those licks!" Puppy exclaims, his tail wagging through the ripped hole of his undies.
"Thanks Puppy! I like you a lot! Can we be friends?" Johnny says, his cute bubble butt shaking a bit.