In Space, Holes are a problem

We have already covered, in quite some detail the problems of passing gas in space. Not so much a problem inside a spaceship, but potentially a problem on a space walk, especially if the said activity, if particularly powerful, produces a rip in the scafander. The air leaves and it's all over for you. Perhaps those beans tasted too well last night, eh?

The holes in the hulls of spaceships and in space-suits are incompatible with human life.

Then, there is the perennial question about sex in space. Did they or didn't they? Officially, nothing ever happened. Unofficially, sure it did. Between astronauts down on Earth and most likely on spaceships. But it is difficult.

And out on a space-walk, it is even more difficult. Again, there is the problem of holes. How do you design a spacesuit for this? One with a female condom and another with a male condom? And what if the condom breaks? Poof! You're dead. Not to even mention the problem of action+reaction forces....

So, if holes are such sources of horror in space, why, oh why, is there a gun on the Space Station? To ward off aliens? To shoot an ex-sex-partner when he farts?

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Black holes have come up a couple of times this week, and I've always wondered something.
Ok - I'm crowdsourcing the internet, because the google has failed: there are two science fiction short stories that I need titles and authors for, source in anthology or collection would be better still.
Last Saturday, we went to see WALL-E with our 4 year old niece. It's the story of an ordinary cleaning robot (WALL-E stands for Waste Allocation Load Lifter Earth-Class) that, well, keeps cleaning a city on earth long after humans have left earth.
For an important mission to Earth?

As the story says, the gun in in the survival kit of the Soyuz spacecraft. Don't forget that the Soyuz lands on, well, land. Remote land. Land with animals and stuff.

And if it comes down at night, shooting off a flare would help them find you.

You know, if somebody went nuts and was going to cause problems with the space station, I'm sure they could find something much more dangerous than a gun.