Old London professional photographers' joke:

Two models are in a coffee shop, comparing notes. One says to the other:

"So, how was your nude photo session with Gareth?"

The other says:

"Oh, he was a perfect professional! He didn't touch, or raise his voice, or make rude gestures or ask personal questions. In fact, when he prepped a close-up shot of my thingy, all he said was 'Look natural'!

(I genuinely forget the name of the pro photographer that this was originally said against.)