Basically, whatever the person before you posts, you have to say
"Luxury!" and then offer a worse thing which happened in your
day.
E.g. Person A: when I was younger my bed was really
uncomfortable.
Person B: Luxury! Back in my day beds were made of rock!
Person C: Luxury! Back in my day we didn't have
beds!
I'll start:
Today I had a back ache.
