15 Interspecies Romances from Pop Culture Where It’s Best Not to Think About How Things Work in the Bedroom

In real life, if you had a friend who announced they were in a relationship with something that wasn’t human, you’d be pretty unimpressed. Our closest relatives in the human world are still pretty different — someone having sex with a chimpanzee is unacceptable however you look at it. Chimpanzees share 98.8 percent of their DNA with humans, but that 1.2 percent, it turns out, makes a big difference.

A lot of sci-fi, though, features humans and non-humans in sexual relationships. There are plenty of cases where it doesn’t seem to matter — Star Wars and Star Trek are filled with species from other planets that are almost indistinguishable from humans apart from silly haircuts or very light prosthetics. Vulcans and Klingons are at least inferred to have genitals and reproductive systems similar enough to humans’ that they can pair up and even breed. We might find out one day that, say, Klingons’ balls are on top, but otherwise all seems fine.

But sometimes you watch something, and a little while later, you find yourself thinking, “Hang on, how do they bang?” Or: “What would that actually be like, if those two hooked up?”

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