Definitely for money. But variety instead of prestige (in that I will do stupid things simply because I have not done them before).
If it's not about prestige for you two, then why so much showing off with it? People have crazier hobbies than playing ukulele and juggling, but keep them for themselves. I'm not trying to judge you, just explaining why it looks to me as if you're trying to garner prestige. Unless we are mincing words about something obvious.
It's called "conversation"! "Human beings" do it as part of "social interaction." It's quite common, and has all sorts of benefits to the individual and the group, I agree it will send a message but not necessarily about hierarchy/prestige.
Unless my ukulele playing and juggling are waaaaay better than I thought!
kat, in your books you would write something like "X lives in Y with her cats." There's a message right there!
Fair enough, I just sometimes suspect that people who show off with this kind of stuff (which they claim they do for personal pleasure) want to stand out from the group - overshadow their competition. I've noticed it's typical of the lesser ones. The greatest ones don't have to advertise themselves. I take it you have other reasons.
I simply like to keep most things to people with whom I share them, e.g. my husband was recently the first to discover my lifelong interest in the history of philosophy of science, which I know quite in detail, but only now that he works in research (and not brain-etching finance) we can share it. I often use my cats to divert people's curiosity from myself or gently refuse answering some of their question. Some chapters in my book are designated with need-to-know restrictions.
As for social interactions, if they don't flow naturally, one can always talk about the weather. We had a plumber in the morning. He had a Dutch accent but turned out to be a former surfer from South Africa. He stayed for my killer espresso and we talked about the current situation of Afrikaners, which affects also his family. I mentioned similar incidents in Eastern Europe's history. Nice and interesting person for some social interaction.