I seem to recall playing this many moons ago, somewhere I cannot remember exactly where, but the basic premise is,
1. I ask a question comparing two things.
2. the first respondee picks their favourite of the two, then also posts a question comparing two things.
3. The second respondee picks their favourite from from the second question and then posts their own question and so it goes.
4. The other thing is, there should not be repetition of a question
I'll get the ball rolling.
Pepsi or Coke?