I know people who work on mission operations, where they're basically on a Skype call with the ISS all day. Several years ago, there was one astronaut in particular who had to be frequently reminded to cover up. Once they're up there, no one can prevent them from doing what they want, especially if it's their last flight. They're professional in the sense of completing the mission, but they're humans with pilot personalities and nearly zero privacy to begin with.

Who would honestly turn down the opportunity to have sex in 0G if given the chance

I mean, these are curious and scientifically minded people. Someone should do it in the name of science.

There was an article in Playboy many years ago that I read (and the search results in that domain are now far too polluted - and yes, I did read the articles) that basically said "either you're going to need a lot of velcro or assistants.

The problem being that every action has an equal and opposite reaction makes certain activities more likely to result in new force vectors which in turn results in velocity that may lead to bumping into things you'd rather not bump while trying to bump uglies.

On the other hand, my impression was that they do have a lot of velcro on the ISS, or places to strap yourself to in general.

If the two of you are weightless in the middle of a room shouldn't you remain in the middle of the room so long as you don't throw anything?

Like if you wiggle your arms you won't start to swim through space so as long as your bodies are wiggling then you also shouldn't start to swim? As long as you kick your shoes after before not during it seems to me that there shouldn't be an issue.

You're working on a one body problem there. This is a two body problem where some force applied will cause a transfer of momentum from one body to another. Without something to tether the two bodies together, it is quite likely they'll move apart.

The 3-Body Problem: A new movie adaption by PornHub.

> they're basically on a Skype call with the ISS all day.

Do they still use Skype up there?

No idea. Perhaps someone who's still affiliated can answer.