My girlfriend came from space. This isn't weird to us anymore, especially since we know how aliens can um... interact with humans. Some things are still new, though. We've never... done anything, but I'm not nervous about when we do it. I've seen how aliens do their thing. Her dorm room is on the other side of campus. She hasn't masturbated in two weeks and counting. She knows how human vaginas work, and penises, too, but she's really fascinated by human sex- she used to watch human porn and jerk off all the time, but this week, in particular, she's tried to stop after seeing the huge loads humans expel after not cumming. She's mostly exactly the same as humans, just blue. She only has the one difference.
In her room, I kiss her. I touch her chest and fondle her nipples, and take off my pants. This is how we usually do things. She just gets me off. She gets hard, but she never actually does anything. If she sends nudes, her dick is always cropped out. She's self-conscious about her dick. She moves her fingers towards my panties. "No, wait," I say. "I want you inside me this time."
"But... um... I've never had sex before." She says. She's completely hard, though. "At least, not with a human." Her cock wriggles in her panties, they're tight. I touch her, then pull her panties down just a little. Her tentacle cock wiggles in... excitement? I hope? I start to stroke it up and down. It gets stiffer in my hand, and she starts to drip precum onto her cock. It gets slippery for me. She bends over to take off her panties. I don't know if it's okay to put her cock in my mouth.
She kisses me and I keep stroking her. She pushes her cock up against my panties, and her tentacle cock wiggles against my panties, where my clit is. It feels like a tongue, but thinner. I start to whimper into her mouth and she gets faster at flicking my clit with her tip. I feel her dripping out precum. I don't know who's wetter.
I take off my panties. She starts to flick it with her wet tip.
"I want you inside me, fuck me," I moan. I roll over onto my back.
"Are you sure?" She asks.