He chose a cat dick.
“Not a bad choice”
A short mist came out of the floor in front of him and a cat appeared.
It was an elusive white tiger with thick dark stripes. It growled a horny growl and presented itself.
Fur grew around his balls and a furry sheath began to grow. Viper started panting feeling hot. The feeling was unbearable and Viper grapped onto it, not wanting to fuck the cat just yet and masterbated. He rolled his eyes back and cum a bit.
The tiger still presenting itself stopped. She turned over and moved closer to Viper licking him on the thigh. Viper orgasm not noticing the fur growing on his hand like paws.
He felt fuzzy on his hand, held them to his head and screamed.
“I told you the more sex you have on your new dick means the more anime you become. Doesn’t matter WHO you have have sex with, even yourself”
Viper open his mouth to protest when he felt a rough tongue on lapse his up and down his dick. Viper shiver and moaned.
He quickly became stiff again this time noticing the cat’s present. The cat stopped licking and presented itself again. This time Viper had no second thoughts and plunged himself. At the second orgasm he stared in horror as his legs widen and cracked. He fell onto the cats back. Being so close to the females scent he couldn’t help but bit, claiming her in the process.
After regaining his stability, he looked to see how much has changed. Viper had full on paws, a cats ear, legs the looks of the cat, and a small numb moving side to side, a tail.
The demon lord asked, “what are you going to do now?”