I probably wouldn't post about it on Facebook, but that's because I don't post much of anything on Facebook. I don't mind talking about that sort of thing though, even though I'm aware that it isn't exactly 100% socially acceptable to do so.
Ha! This just reminded me of when I was thirteen. I used to get sudden bloody noses all the time and it had happened in school that day, so I ran to get cleaned up but some had spattered on my clothes. In the next class this snarky girl said, "What, get your period for the first time today or something?" (Who would be that messy anyway?) And I calmly said, "No? My first was when I was 10." To which she replied, "Ewww, I did NOT want to know that!" And everyone looked at me like I had grown horns. I just thought, what? Not my fault you brought it up. If you were so disgusted with the idea, it shouldn't have entered into the conversation. Sometimes I feel people are too scared of normal body stuff.