Have you ever wondered why the “aliens” are always dressed in the same costume? Did they just go “Ok, from tomorrow, all of us shall wear green tights with gold polka-dots on them...” and unanimously passed a bill?
Or is it simply because we have always seen the Star-treks and the Blakes-Sevens in their “uniforms” and it makes us think that the aliens also must be in their uniforms when they visit outer space?
Whichever way, it looks like there's no room for fashion designers or the skinny models in the future - or in the outer space. No wonder the aliens get sick of their planets and start wandering around the milky way - how would you like to see all the women in the planet in the same under-wear? Only different in size? No colours, no laces, no strings, no thongs, no frills - life must be boring enough to hop in a space shuttle I suppose.