You give it a taste.

Sitting on the bench naked with a massive cock in your face is hardly how you thought the evening would go, but there you are. “I am not sucking your cock.” You say confidently, yet no sooner do you finish saying it, you lean forward and the meaty head slips past your blackened lips. Reaching up you can see your fingers getting narrower in seconds as you take in the length of his meat. Pulling it in with your now perfectly manicured nails, you engulf his cock down your throat like an experienced whore.

“Take it easy, this isn't a race. The longer you suck me the more feminine your body will become, if you get me off to quickly you will be a rather masculine woman. Once you swallow your cock will vanish and a cunt will take it's place. So if you want to be a beautiful voluptuous girl you have to suck nice and slow so your tits and ass have plenty of time to grow. As you can tell your body has already shrunk to a rather boyish little transvestite right now, so slow down, keep slurping me down your throat like that and you won't have any tits at all.”

You can hear what he is saying, but it doesn't fully register. Still part of you says stop, pull out and run, another says drink it fast, you need to feed. But wait, if you don't pull out you won't have a cock anymore. Your mind says this can't be real, but as you are now looking up at a much taller man, you can tell he isn't lying, you are no where near as tall as you were moments ago, his now even more massive seeming cock stretching your mouth to the limits.