8 Sci-Fi Clichés That Need To Calm Down

5. Sexy Crayola Aliens. That Have Vaginas.

Filmmakers have always battled with the problem of how to make their aliens sexy. It's a tricky thing to do, what with them being a completely different species and all, but the trope of the Space Babe persists. Her name probably ends with "ia".

Back in the day, it was the done thing to stick on a prosthetic forehead or crazy eyebrows and maybe paint her a funny colour. Now, we've decided that the even bumpy foreheads are a bit too icky and just settled for a rainbow of Crayola Space Hussies. They will invariably sport a pair of impressive mammaries, regardless of whether or not they are actually a mammal.

When the inevitable inter-species bonkfinally happens, the characters rarely seem to encounter a problem with compatibility - and we're not talking about emotional compatibility here.

Apart from anything else, their vibrant non-racially-charged skin tone would seem to indicate that their chemical make-up is vastly different from humans, drastically increasing the chance that one or both party'sbodily fluids will be caustic to the other. Perhaps the pre-coital patch test is just not sexy enough to include.