The Perils of a One-Track-Mind

"You've got a one-track-mind!"

It's often said derogatorily, directed towards a male person and delivered with a high innuendo factor. Just another hackneyed cliché*, it's always eager to be rolled out, sitting at the ready on the tip of many a friendly wag's tongue.

Thing is, there is no other sort of mind. At least not when it comes to using the 'thinking part' of one's brain. Sure, there's a plethora of tasks going on in the old grey matter, all at the same time. You could be eating a bar...