It's harder to get them to stop.

I love when I get someone to talk about something they clearly love, and they're giddy with joy and struggling to contain themselves. It's one of the finer pleasures of talking to strangers and not machines.

Good point. Fixating of the fly-fishing example is silly to begin with but yeah- if you don't know a guy, it's certainly an opportunity to meet one.

Not everyone live in a big city.