Sam was already hard after getting to play with Nine's massive tits, however when he saw her on her knees in front of him his excitement reached new levels and he immediately unbuckled his belt.
The Valkyrie watched, eyes filled with anticipation as the Doctor finally revealed his tool. She wasn't an expert on human anatomy, especially the male side, so she didn't know how important size was. With that said, when she compared Sam's with the only other tool she saw thus far, the one belonging to the soldier they peeped at in the library, Nine was surprised to see such a significant difference.
"So this is Doctor's male part…" She said, leaning forward a little to get a closer look. "Does the shape differ between individuals? Though it's much thicker than that of the soldiers we saw the other day, I would say yours is a bit shorter, Doctor."
Sam felt a heavy hit to his chest causing him to recoil. The blond Valkyrie clearly had no idea what she was talking about, however hearing her say his rod is small did hurt quite a bit.
'Wait, I'm pretty sure it's not that small…' Sam thought, looking down at his own penis. 'I would say it's… average…'
He tried to rationalize what Nine said as just an observation. Also, she did mention that his was much thicker so it wasn't like he completely lost the competition.
"Nine, it's rude to comment on the size of a man's organ." He said with a forced smile.
"Ah! Sorry! I didn't really know…" Nine replied with a flustered voice.
Annoyed and getting tired of the wait, Sam inched closer to the Valkyrie, placing his tool right in front of her lips.
"You don't have to be concerned about its shape or size," Sam said, staring down at Nine with half-lidded eyes. "After all mine will be the only one you'll ever experience."
The blond Valkyrie looked at him with wide eyes, seemingly a bit shocked. A moment later, however, a smile spread on her face as her expression became more coquettish.
"Yes, of course!" She said, her hand moving to touch the fully erect rod. "Doctor is the only one I can do this with, after all." She began to slowly stroke before wrapping her delicate fingers around it. "I just have to follow the same steps as that female soldier, correct?"
"... yes…" Sam said, his entire body stiffening for a moment when he felt her grip.
"Then…"
Moving her eyes down to the target, Nine raised it a little and placed it on her lips, then, without much hesitation, she gobbled the entire thing in one go.
A violent current flooded Sam's nerves causing his head to shoot up. It had taken him by complete surprise; He never expected that the first thing the Valkyrie would do to be deepthroating his entire tool in one go.
It took quite a bit of concentration to not ejaculate right then and there, and just when he started to feel the warmth of her mouth, Nine moved back, her lips sliding on the shaft as she slowly took his thing out.
Taking it in her hand once more, she began stroking it up and down, the saliva covering it acting as a lube.
"How does it feel, Doctor~♡" The sensuality in her tone and the smile she wore made it appear as if she knew exactly how he felt.
"Y-yeah… it feels good… keep going…"
"Then~♡"
Same as before, Nine didn't hesitate when bringing the rod to her mouth. She began from the base, slowly running her tongue along the shaft all the way to the tip where she would stop to suck on it a little before going down once more.
The way she gasped for air spoke of her arousal. Her movements were slow and precise, almost as if she already knew what's she doing. When she said she would follow the same steps as that female soldier Sam didn't have enough time to think it through. What Nine did was imitate the actions of a much more experienced woman, and because of that, she ended up skipping the learning phase making it seem as if she knew what she was doing even though it was her first time touching a penis.
"Hah… mmn… ha~~h~♡"
Either way, Sam couldn't deny how incredible it felt. A Valkyrie was licking and sucking his rod as if it was the most delicious thing she had ever tasted. Watching that beautiful creation from above, the pleasure he was experiencing was magnified gradually pushing him toward a climax.
As if catching on to that the Nine went down sucking on his balls while tightening her grip, moving her hand faster and faster. A moment later white fluid erupted from the tip, shooting up before splattering all over the Valkyrie's beautiful face adding to the lewdness of her expression.
"Ha~~♡"
Letting out an extremely sensual sigh, Nine backed away and looked up at Sam with a smile.
"That was… incredible…" Sam was panting, his body still twitching after he shot his first proper load in a long time. Looking down at the Valkyrie and seeing her sullied face he couldn't help but smile. "You're really good at this, Nine."
"Is that so~?" She said, her smile deepening. "I'm glad you enjoyed it, Doctor~♡"
referring to her knowledge of what happened in the library, Nine decided to wait for a while giving the Doctor's rod some time to regain its stiffness. As she did, her attention moved to the mysterious gooey substance that had begun to drip on her chest.
"By the way, Doctor." She said, pinching a little bit and rubbing it between her index finger and thumb. "What is this white liquid? It smells strange but… I don't think it's urine…"
"That's…" it was a bit awkward to explain. For a woman who had just given oral sex to not know what it was, Sam found it quite weird. "It's sperm. The male seed."
"Ah! So this is what causes females to get pregnant?" Nine said, clasping her hands together in realization.
"Yes, that's correct."
Not a moment later, Sam's tool stood up again, having regained its vigor. Nine gasped with a hand on her mouth, but then a smile formed on her glossy lips as she understood what that meant.
Not waiting for Sam's permission she began working her tongue cleaning the sticky stuff leaking from the tip. She then stopped to swallow, gazing at the penis which was now covered in a layer of saliva instead.
Moving on to the next step she remembered, Nine shoved the whole thing inside her mouth before slowly taking most of it out. She then began bobbing her head back and forth pushing the thick rod all the way to the back of her throat while keeping her lips pressed tightly around the shaft.
Nine was completely engrossed in the act, so much so that she failed to notice her rising temperature and the leak in her groin. Before long the penis began to twitch again, but before she could take it out, the Valkyrie felt two hands hold her head firmly in place before the thick rod was suddenly thrust forward, warm liquid erupting into her throat.
Left with no other option, Nine gulped down every last drop. A few seconds later Sam finally began to relax, only realizing what he had done just then.
"Sorry, I couldn't help myself." He apologized, seeing her hold a hand to cover her mouth, a difficult expression on her face.
Sam didn't really feel bad about finishing like that. Quite the opposite, in fact. It has been some time since he last experienced such good head and he quite enjoyed ejaculating directly inside the Valkyrie's mouth. He planned on doing it whenever possible, but looking down at the sex robot, he got a feeling that she didn't like it that much. Or so he thought until she regained her coquettish smile a couple of seconds later.
"That was close…" she said, placing a hand on her chest as she heaved a satisfied sigh. "I almost spit it out by mistake."
Hearing that, an excited smile crept onto Sam's face.