Basically, you post something that functions as an 'answer', then the next person posts a question to fit the answer, and so on.
Example:
User 1: Vomiting
User 2: What's your favourite thing to do for fun?
Asperger Syndrome
User 3:What do you love most about your sister?
And so on.
I'll start.
Yellow
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'You're so cold, but you feel alive
Lay your hands on me, one last time' (Breaking Benjamin)