I've been thinking about icky impostor tentacles today... I imagine they'd be quite slimy?

Green would love slowly trailing a tentacle down your skin just to watch you wince or squirm at the unpleasant sensation.

It'd be cute if the sliminess of the tentacles left Orange prone to accidentally slipping their grip a little every now and then - they're a bit of a klutz.

I think the ooze could definitely serve as a natural lubricant...

Post sex, once they've reverted back into their crewmate shell, I can see an impostor leaving a big puddle of mucus in their wake - you'd probably be covered in it, too.

I think once orange got past how much it turned them on they'd immediately jump to fussing over you. They'd take off their jacket and try and clean you off with it. They're so preoccupied on getting you cleaned up that they end up forgetting that the room needs to be cleaned up, too... Orange accidentally trips on their own fluids before leaving and then the next day the crew discovers a big puddle of mysterious goo on the floor. (It'd be really funny if this was how the crew had to find out that there's an alien on the spaceship)