A Futa Tsunade!?

Jiraiya was almost more baffled then aroused at what he saw, almost. The naked person thrusting into his student was clearly his teammate and longtime crush Tsunade Senju but he knew her body almost as well as his own both from fighting together and from his peeping. And he knew for a fact she did not have a dick, and while his view wasn't the best he could clearly see that she wasn't wearing a strap on it was a cock.

"Jiraiya you perv you lost focus and I can see you hair so get in here!" Startled Jiraiya fell into the room face first "Surprised? Your student here thought to take that stupid Sexy jutsu and reverse it so girls can know what it's like to have a dick. She asked me for help and we got it working, a girl could have the fully functioning cock they'd have if they were born men. Hers was so nice I thought I was going to get the pounding of a lifetime but instead she asked if I could learn it and look what I got!" With that Tsunade lifted herself fully into the air out of Naruko's wrecked cunt, showing off her cock. As thick as her fist and almost as long as her forearm Jiraiya got a good look at it, it's mass cowing him as much as it arosed him to see it connected to Tsunade when suddenly she just dropped back into the girl who let out a wail before casually rising and dropping into the screaming girl.

"This little bitch was pawing and begging for me on sight and I have to say Jiraiya I totally forgive all the perving now. Using a dick is great and I can just imagine how frustrating it'd be to not have girls line up on sight, I knocked up this bitch so fast I forgot I was fertile once I felt how good her hands. Don't worry though I remembered the next dozen times I fucked her and I remembered when I knocked up Shizune and Sakura." Suddenly Tsunade's thrusts turned quick and shallow "Fuck I'm cumming again, watch me Jiraiya, watch me do what you never could!"