There are lots of things that you’re allowed to do on earth that you absolutely can’t if you’re an astronaut. Some of them, you wouldn’t expect.
One big rule is: no sex allowed. The limited space could complicate things, plus other risks. Another thing is booze. Also is bread, or crumbs, because they can float around and get inside instruments. There are other rules that should be followed in space. Find out what else.
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