For no reason at all today, my thoughts turned to a joke that was originally told me by, of all people, my maths teacher. John "Sooty" Cole taught me, amongst other things, co-ordinate geometry at school. This is the kind of geometry where X-squared plus Y-squared = R-squared describes a circle. Other formulae apply to ellipses, parabolas and so on.
So there we were, up to our ears in X-squareds and so on and he pipes up with: "What shape is a kiss?" We were a bit taken aback. This was our maths teacher, not known for sexuality of any kind (impossible in someone as old as his mid-thirties, anyway), and he's asking a serious question or telling a joke?
The answer is elliptical (A lip tickle) Anyway it made me smile, and if it makes you smile, that's cool too.
Have a nice day :)