During the fifteen-minute wait, you get a drink of water and drink it as you wait for Dr Hurley to return. Once she does, she says, "OK, thanks for being patient!" and sets down a container which holds some experimental pills.
"No problem," you reply. "So, uh... what kind of research am I helping with? I don't mind what it is, but if you can tell me that'd be great."
"Of course! It involves a process we're testing on traits of embryos. Are you OK with that?" she asks. You nod, a bit confused what she's implying. "We basically need external donors' sperm so we can genetically modify it using our experimental techniques."
You're blushing now at the thought of having to do a sperm donation, but hey, you aren't gonna object to pleasuring yourself for money. "So, do I need to go in a room with a cup and some porn mags?" you laugh nervously.
"Not quite," says Dr Hurley. "The amount we need to find sperm that will take to the treatment is so great we can't just use the 1.5 to 5ml of semen a human penis releases in a normal ejaculation. That's what the device in the centre of the room is for." She points to the glass cylinder, and you notice a circular hole around the level of your hips. "It stimulates the body to release around 25ml of semen on ejaculation. From what I've heard it's also very pleasurable, and experimentation has proven it has no permanent impact on the body."
You're blushing hard about all this, but she offers to leave the room. "If that's OK," you say. She smiles and lets herself out, at which point you drop your pants and look down at your member, semi-hard from all the talk.
You position it carefully inside the hole in the cylinder, and feel it turn on. Within seconds, you're gasping from the intensity. Your cock rapidly reaches full mast, and your hips start on auto pilot, humping against this warm, moist, soft, clenching passage. You shut your eyes and just keep thrusting at the hole, feeling like an animal in heat. As you get closer, you even start to moan with pleasure- something you've rarely ever done before- and your balls slap against the outside of it. Eventually they spasm and pulse against it as you cum, and it seems to stimulate them, milking you far beyond your natural limits.
Once you've recovered and got your pants back on, Dr Hurley comes back in and says kindly, "Thank you so much. You did really, really well! If you want to go back to reception, they'll give you your pay."
You do so, and they give you about $400. For about an hour's work! You're over the moon as you go home, wondering what exactly Dr Hurley has planned. Little do you know the ramifications of what you just did...