Why...

...are printer ink cartridges like lemmings?

Because, when one goes they all decide to go!

Five out of six I've had to replace today. And the other one is flashing signalling the impending doom of its imminent demise.

I don't normally print out general stuff, it's reserved for photos, but I'm off to Cambridge tomorrow with work colleagues and I needed to print materials for the day, I hope they appreciate it.