Frank asks you to have a look at your basement, since he had some issue with humidity at theirs. You give him down into the slightly lid downstairs of your house while Bonnie stays upstairs with your mom. He was laying his darked toned fingers with black fingernails on a wall, wiped over it and looked back at you. " what are you looking at?" he asked you, while you were staring at his furry and manly looking well muscled body. " I just haven't seen a stallion man before"... you answered. " So what do you find so fascinating?"... Frank answered as he turned around and slides his hands over the back side of your jeans, making your dick become erect..." well, I wonder how it feels like to just being naked and feel comfortable walking around without being afraid of getting a hardon, pardon my language". Frank looks deep into your eyes."I have to admit that I cannot control it always..." you notice that out of his equine shaft a flared black and pinkish spotted head is emerging. " What is going on?" you ask Frank, while he unbuttons you jeans. " you wonder how it feels like? You can become just like me, only difference will be that you need to be with an equine man". " how does this work" you wonder.. " Frank kisses you and grabs your now naked ass and says" I am going to show you". He undresses you completely, while his equine shaft/ dick got erected to an amazing big size, the smell of it making you just getting harder... You fell the urge to kneel down and lick his big balls. They feel really leathery and thick as you work yourself to the top of his really huge flared dick. The moment you lips touch Franks dick your whole mouth feels odd and lump, you pull way as Frank says" don't be afraid, just continue" him talking in combination with his musky smell make you forget about your lips and now also odd feeling ears. Frank turns around and bends over a bit. You push his tail aside and start to lick his ass just under his tailbone.. frank let's out a wild whining moan while you are getting crazy with the smell and sight you have... Not noticing the changes at your ass... Frank turns around and slides one of hands back at your ass..." that happened quick" " what happened quick" you wonder... " the change of your rear and ass" Frank with his strength lifts you up, turns you around and looks at your half human, half stallion like ass. Your anus already equine inside a still human proportioned ass makes Frank wild. He slides his shaft over your ass cheeks making you bend over. He licks you still human balls until they grow and become leathery like his. " do you wanna have a stallion tail" he asks, even before you can answer he pushes hick Cock into your equine anus, as you feel a pressure just above it on your ass.