In his mouth

"I'm going to cum in your mouth now, Robin," Dr. Clay said. It took all of his willpower to maintain a professional tone. "But don't swallow it until I tell you to."

With a grunt Dr. Clay started to cum, he reached down and stroked himself, emptying his balls on Robin's tongue.

He pulled out and tucked himself away.

"Good, now this is the important part. Keep rubbing yourself, and swish my cum around in your mouth. Taste it. You love that taste. It tastes like humilation and humiliation makes you horny. Keep swishing it. Notice how it grows bigger in your mouth as it mixes with your spit until it feels like your whole mouth is full of my cum? Good. now open wide so I can get a picture for your records."

Robin tilted his head back and opened his mouth. Dr. Clay took a quick picture of the young man, his lipstick smeared and his mouth full of frothy cum.

"Good. Now you can swallow."

It took two swallows, but Robin got it all down.

"Can I stop rubbing now? Or can I cum? I'm so horny!"

Dr. Clay considered. Maybe he should give Robin a reward for playing along so nicely....