The rules are simple: someone comments two apparently unrelated concepts, and in the replies people have to try to connect them in an interesting way.

An example: sugar and keyhole.
I like putting sugar in my coffee. Coffee is brown. Leaves get brown in autumn. Autumn is a season. Seasoning food usually makes it taste better. Taste in furniture is important to make a house look good. Houses are private places. Private places have limited access. A way to limit access is to build a door which can only be opened with a key. A key goes into a keyhole.

It shouldn't be too short, so it's kinda interesting, but also not long enough to become tedious. I hope you guys enjoy it. Game on!