When aliens come to Earth to investigate life here, they don’t simply beam up a specimen and start probing. (And they’re also, by the way, not disproportionately interested in the anus.) Only a novice prober would do a simple beam-and-probe, and would surely get a quick rap on a proboscis from the instructor. The problem with abducting an animal of interest, all by itself, is that you can’t understand an animal without an appreciation of the environment the animal inhabits.

Take 2 minutes with Canadian astronaut Chris Hadfield and you too will know how to pee in space.  And the origins of shooting stars.   He starts with "when you go to the bathroom on Earth, you are relying on gravity, pretty heavily... imagine if you were halfway done and someone shut off the gravity, it would be a mess..." and it just gets better from there.  You'll never look at the sky the same way again.