Where can I find an "arse-o-meter"?

That's not the official term for it, and it has nothing to do with legalising gay marriage or anything like that. It's a device for measuring the distance between your sit bones, so that you can buy a bike saddle that fits your arse.

Everything you ever wanted to know about why cyclists use stupidly small and hard-looking saddles can be found here - and a proper description of the arse-o-meter.

Yes, there has been a dearth of photos this week. Battery went flat on me one morning, and I've seen nothing of interest since.