Ren fought against the flood of students pouring out of the university's chemistry department. After a short walk, he stepped into the materials engineering lab.
"Hey Sally," he called out.
A woman in a pristine lab coat looked up from the laptop sitting on her workbench and smiled at him. Her black hair and slightly darker skin belied her mixed heritage. Her American father fell in love with Sally's mother during a business trip to India. He brought her mother back to the States, and their daughter arrived about a year later. Sally wasn't her real name. Her mother insisted on naming her after her great-grandmother. Unfortunately, Americans had a hard time pronouncing it correctly. By middle school, she almost exclusively went by her nickname.
Ren discovered all of this while tutoring Sally for her computer sciences class. With his new experience under his belt, he now realized she had dropped some less-than-subtle hints that she might be interested in more than just tutoring. Sadly, they went right over his head at the time, and they settled into a companionable friendship.
The smile on his face faltered for a moment as he realized those romantic thoughts would make her susceptible to Xaal's blessing. He would have to make this quick.
That was going to be a problem, though. Sally's lab coat hid a shapely body, firm, apple-shaped ass, and perfectly sized breasts for her frame. Ren spent many nights after those tutoring sessions imagining her bent over as he pounded his cock into her from behind.
Now he was kicking himself for realizing that could have been a memory and not a fantasy.
"Everything okay, Ren?" she asked, giving him a worried look.
"It's all good, Sal. Some things in my life have changed recently, and I'm discovering how completely oblivious I was when it came to women."
Sally smirked, "Yes... yes, you were. Got yourself a girlfriend, I take it?" Ren didn't miss the hint of disappointment in her voice and mentally kicked himself again.
"Not quite. At least, I'm not sure if she wants to be my girlfriend."
"Friends with benefits?"
"No, we haven't slept together though she's made it clear she wants to. Wait, that's not what I came here for."
"Oh? So this isn't just you stopping in to say 'hi'?" asked Sally as she leaned back against the lab bench. The simple movement let her labcoat fall open making it framed her breasts nicely.
Ren glanced down and noted the two hard bumps poking against the inside of her shirt before wrenching his eyes back to hers. "Only partially, I met a woman who has an interesting condition. Her tongue is super rough, as in, cat tongue rough."
"That's weird," said Sally, standing up a little straighter.
"Very, but it has made it impossible for her to give... um... oral sex without hurting her partner."
Sally gave him a sidelong glance. "Are you just being a good wingman, or are you hoping she tests it out on you."
Ren blushed, "Uh... no comment."
Chuckling, Sally turned and bent over her computer. "So, what are your requirements?" she asked as her fingers flew over the keyboard. "Durable, since it needs to stand up to friction. Non-toxic and flexible since it goes on the tongue. Has she ever tried a dental dam like they use at the dentist's office? I heard sex workers use them to avoid direct contact during oral sex."
"I don't know, but that seems like such an obvious solution I imagine she has and it didn't work. She did mention that her tongue shreds condoms if that's any help."
"That means we need to add puncture and tear resistance." Sally tapped at her computer for a few seconds. "Any other requirements?"
"She mentioned that she wanted to taste her lover."
"Hmmm... That will be difficult with all the other conditions. Porosity doesn't play well with durability. However, I think I can get something to work. I'm guessing she wants it textured?" After a moment of silence, she looked back. "Ren?"
"Yes, what?" he said, blushing bright red. As Sally talked, Ren noticed her hips swaying back and forth as she typed away and quietly moved behind her for a better view of her luscious bottom. Unfortunately, her lab coat blocked most of his view, but he could still make out most of its shape. He quickly found himself entranced by the image in front of him.
Sally smiled. "About damn time you noticed my ass, but I need an answer. Does she want it textured?"
"I'm sure she does. Probably something a lot closer to a normal tongue."
"I'd be curious to meet this woman and see for myself just how rough her tongue is," she said before going back to tapping at her computer but not before flipping her labcoat up onto her back and giving Ren an unhindered view of her jean-clad rear.
The movement also wafted the scent of her arousal in his direction. While he had hardened slightly watching her ass sway, the smell of her excitement made his cock strain against the front of his pants.
After a bit more tapping while simultaneously teasing him and rubbing her thighs together, Sally stood up and turned around. Ren resisted the urge to hide his erection, and she rewarded him with a glance downward and a smile.
"The good news is that a lot of the materials I will need are readily available on the market as DIY adult toy kits. The bad news is that none of those are porous enough to transfer flavor to your tongue's taste receptors. I want to try a modified version of the method they use to make aerogel and see if I can come up with a good balance."
"I can't say I know much about aerogel, but isn't that stuff really brittle?"
"It is, but the structure of aerogel is only a few nanometers thick, which is what makes it brittle. I don't have those kinds of constraints, and I'll be using long-chain polymers to meet the other requirements. Now... this is all interesting in theory, but developing this is going to cost a pretty penny in materials and research time, not to mention I'll need to request use of our supercritical chamber."
"Supercritical chamber? That sounds dangerous."
"It's dangerous, but not as bad as it sounds. There are YTers out there who have made them at home, but the university's is a lot larger. With luck, I may have your cat-tongue condom done in a few weeks to a month."
"Can you put together a price for me to give to her?"
"I can," said Sally. Stepping over to Ren, she traced a finger along the outline of his cock. "But if she wants this to perform oral sex, it will need thorough testing. And is the case for any good experiment, there needs to be control data."
She looked up at Ren, and their eyes met.
Sally loved it rough, but oftentimes the men she wanted for boyfriends were just too nice to slap her around during sex like she wanted. She loved breath play, especially if it was a cock keeping her from breathing. One of her deepest fantasies was to record her lover shoving his cock down her throat until she passed out, then later watching as he continued to throat fuck her while she lay there unconscious. So far, she had yet to trust a man with this particular fantasy.
Regular sex was good, especially if breath play was involved, but the pain/pleasure of anal was how she really got off. Ever since first taking a cock in her ass, she was hooked, and some of her shorter-lived boyfriends had never even been inside her pussy. Unlike most of her friends, Sally got off on the pain and only wanted enough lube to keep from damaging anything back there.
She enjoyed receiving oral sex, but it fell into two categories for her. The first was the obvious precursor to other activities, but she also liked the idea of lying back in bed on a rainy day and letting her lover lap at her pussy all day. Even better if they were into rimming, she adored the feel of a tongue spearing into her tight little sphincter, but anyone tonguing her ass needed to be ready to give her a proper assfuck once they stopped.
The last thing he caught before Sally's data dump ended was a slight disappointment that Ren was probably too nice fuck her the way she wanted.
Though he hated to admit it, Ren agreed with her. He didn't think he had it in him to treat her like that, and he really had no desire to slap her across the face. Even if she liked it, the idea felt wrong. But things had taken some unexpected turns with Angela, so he couldn't be completely sure what he was capable of.
Ren hooked the front of her pants with a finger and pulled her closer. "Are you volunteering to be the control?"
"No, I'm the one administering the experiment. Your observations will be the control data." She said, gripping him through his pants with one hand as the other undid the button on his fly.
