I don't know about you guys (all otakus, specifically yaoi fangirls) but people are always claiming to have "gotten a nosebleed from the yaoi/yuri/moe/kawaii/awesome/derp/etc" in comments on stuff all over the web!
But then I thought to myself , does this numeorus amount of people combust in nosebleeds every day? Of course not, this would be medical conundrum! It's like it was the swine flu all over again.
Of course, I didn't end my musings there. I noticed that I indeed felt something while reading certain... stories (I didn't say yaoi instead of shonen-ai for nothin'...). It felt like a tickle, specifically in my right nostril.
Kind of like the sensation before a sneeze. Is this what everyone else means by saying "HOEMAHGAWWWHD I JUZZT HADDA NOESBLED!!!one1!"? Or is it just me (and my perverse brain)?
Ask around. I believe I have a plausible concept.