My sister, observing me unpacking all the stuff I brought back from Derby today, asked me, “Why do you have three cameras now?”

I looked at her, confused, and she pointed at the three SLRs I’d just taken out of a box and put on a shelf. I said, “Oh, those? I don’t know, I just seem to collect them without realising. Anyway, I don’t have three. I have four.”

I pulled another camera out of a box. “Five.”

I spied the bag on the floor, full of lenses and at least one more camera. “Maybe six.”

She stared at me with one eyebrow raised.

“What?! I like cameras!”