Please, the boi moaned, Its so heavy! I can feel it pressing&
The boi was a dripping, blushing mess and hed only had his tail on for five minutes.
Thats not what puppies say. the man scolded him. Now wiggle your tail like a good pup.
It only took another five minutes. With the pressure of the tail plug pressing on his puppy-spot and the added ball massager the boi had no chance. He wagged his tail to a full blown orgasm.
The man was waiting, Good pup, he quickly jumped up and wrestled his pup to the ground. Within moments the final piece of the tail was locked into place - a devilishly clever chastity cage disguised as a bulbous puppy-knot. Now the real fun can begin.
Hope the boy will only be allowed to use his dog-penis-prosthesis and nevermore his human dick now!