Glenn found this little furry thing on the doorstep yesterday morning.
He or she is not a feral cat. He or she doesn't mind being picked up, uses a dirt box and has made his or her presence known to all inhabitants of the house in no uncertain terms.
We googled "cat sexing" and looked closely at the diagrams.
Then we put on our glasses, shone a very bright light to the area in question...
and not finding this terribly interesting, enlightening or pleasant,
thought we'd leave it until later.