He was only gone for a few days but when he came back the world would cum with him.

I didn’t know where I was and I couldn’t see anything my hands and feet were bound tightly. The back half of my body was on a cold metal surface maybe a operating table. It made me shiver a little, while the room temperature wasn’t cold but it wasn’t hot either and at that moment I became suddenly aware that I was naked, with an erection that hurt to have. I could sense that something was close. Then whatever it was started sucking on it, not a hot and wet sucking like a woman’s hot wet mouth would give, but almost cold and nearly dry. But it didn’t matter it had clearly done this before because it felt like amazing it was soft and hit all the right spots. I realize it was living thing when it caressed my balls and was starting to go further south to my asshole with one finger but I was about to cum on or in whatever was doing it. As I reached my peak and was humping and squirming, everything suddenly stopped and pulled off and I shot my load into the air. I could feel the cum land on my stomach with warm spurt then get cold with the air. “Maybe I could try my sex organ sir” said something that sounded more feminine but it definitely wasn’t human.

“No you have had your fun, besides we can’t tire the specimen out any more, get the sperm sample off of him so we can continue” said a much deeper inhuman voice. From what I could tell being bound and blindfolded and all that one was definitely in charge.

“It’s weird how their evolution works sir”

“I know but part of it is because they are so primitive, if we just make them all fuck the nearest human their species should evolve quickly.”

“Won’t that vastly over populate their planet? Not to mention spread diseases sir”

“Well how about this we make this a disease that only works on the healthy, and non pregnant. As well make sure those who are biologically related severally undesirable just to keep their inbreeding impossible.”

“Why not also add that the want to fuck anything they consider exotic?”

“Good idea, as far as the population issue it won’t matter. The one downside to this is if they don’t fuck a least once a day every few days they will die. Making this a survival of the fittest. This will make them evolve faster now, and when the leap happens the disease will no longer be able to affect them.”

“What about those who are adolescent or pregnant won’t they die?”

“Those who haven’t finished growing won’t be affected because the chemicals needed are not active same with pregnant women though they by themselves will be horny without our help”