Your blood test results

"What is it?" You ask, reattaching the towel around your waist. Internally, you still mourn the loss of her clinical yet delicate hands but try to act like it's not a big deal.

"It's interesting. While you suffer from no negative effects of chemical Y, portions of the chemical remain in your blood stream."

"Like antibodies, or something?"

"Kind of. It appears to have chemically reacted, and while portions of the chemical are similar in molecular structure, there is a distinct difference among the two. Like it's been synthesized into something new."

"So the nanobots must have done something."

"Exactly! The nanobots must have somehow combined something your body naturally produces with chemical Y, thus creating a new mysterious compound."

"Do we know what this 'new mysterious compound' does?"

"Not yet, but we can figure it out, if we assume that your nanobots decided to improve an existing facet of your body." Barbara says excitedly. "By comparing similarities between this new compound and chemical Y, we can eliminate the commonalities. What remains must have come from said to be improved chemical. Thankfully, due to dealing with Poison Ivy the Batcave is composed with the tools, equipment, and programs to determine just what was improved."

"All right. Let's figure it out."

Barbara types a couple commands, and the next couple minutes are agonizing as you wait for the results. Suddenly, the monitor beeps again, indicating that the test has finished.

"So what is the result?" You ask, now truly curious of what was changed. This investigation was truly scratching your scientist itch, and you started to wonder with the resources of the Justice League just how much you could improve your loadout.

"Well, it certainly makes sense. It seems that this new compound in your blood has replaced, well, testosterone. Also, we now know why you were able to get erect so quickly after your orgasm in the shower."

"I guess it does. What does this mean."

"Well, it means that I want a sperm sample from you, as soon as possible. If this chemical y and testosterone hybrid now exists in your body, your sperm production must be through the roof."

You shrug, and deciding now was as good a time as any, drop your towel and start stroking your cock, quickly bringing it back to full size.

"I didn't mean right now, but okay, let me get you a cup."

You grin, and keep on jerking. Barbara returns with a small plastic cup. You make eye contact with her as you take the cup with your left hand, never stopping your masturbation. For once, you've made her blush, and she timidly walks away and sits down on a nearby chair.

Once she's sat down, she makes her brilliant counter play. She takes off her Burnside college t-shirt, exposing her midriff as she does so. The act has left her hair tousled, a red mess that covers part of her face, like she's just been fucked. All she's wearing now is a plain white t-shirt, its tightness contouring to her body. The sight arouses you, and you pump faster and faster in response. It seems your earlier fantasies in the shower were correct, her breasts look positively delectable on her lithe torso.

"So, you've really never came with a woman since having the nanobots inside your body?"

Her voice startles you, and still keeping on stroking, you try to answer, "Nope. Oral sex hasn't managed to get me off yet, and when I start to fuck a woman, she always passes out from pleasure or gets too sensitive."

"Interesting. What about anal?"

You cough, startled by just how kinky Barbara might be. "Uh, never had a woman willing. And I don't blame them with a monster like this."

"Well, you clearly haven't met the right woman yet. There's a bevy of women in the Justice League who would have the stamina to last with you. And I know for a fact that a lot of them are size queens, and they would definitely appreciate what you're packing."

"Oh god." you mumble to yourself, accelerating your pace. Barbara's words are getting to you, and its only a matter of time before you'll cum.

"A lot of them are bisexual too, so you'll probably have some threesomes, or even more. Just think, you and multiple superheroines, just fucking your brains out."

At this point, you cum, spurting an immense load into the small plastic cup. And you keep going, more than ever had before. It is only when you reach double digit spurts that they start to peter out. To your amazement, you have filled well over half of the 100 mL cup, which is definitely a personal record. You think back, and you must have lost track of just how much you came while in the shower. That, or, you're still ramping up production more of the nanobot upgraded testosterone. You shudder at the thought of an even higher sex drive, but it also intrigues you.

Barbara walks up to you, and delicately removes the cup from your hand. She too, seems astonished by the sheer volume of your ejaculate, but she quickly moves on, taking a sample and beginning the testing process. While doing this, she calls over her shoulder, "There's some clothes in the bag on that table by you, courtesy of Alfred. They probably aren't the perfect size, but get dressed while I get this started. After that, you'll be free to go. Say goodbye though before you do leave; this place can be a labyrinth at times for newcomers."

You nod in thanks, pick up the clothes bag and head back to the locker room to get changed. You think to yourself just how intense the last fifteen minutes have been, and wonder what's going to happen next.