ヌード美術モデルとのQ&A
https://www.reddit.com/r/IAmA/comments/15tsrq/i_have_been_a_nude_artists_model_for_7_years_ama/

描く側の体験
<タンポンのヒモ>
How do you model when you're on your period? I took a life drawing class for a year and when we had female models their 'parts' were always very visible.
Even if you used tampons there's the string....I'm a female by the way and actually genuinely curious.

<タンポンが使えないモデルさんの悲劇>
Oh my god, I finally get to tell this story...
It's happened in another class, but I am convinced that this is happened.
Female nude model. Menstruating. For some reason she isn't wearing a tampon. Teacher has the genius idea: put a bucket under her.
And that's what they did. A drop of menstrual blood patter every five minutes. For 3 hours.

Students were talking about this event for years...