OK I guess it's just my imagination then
I once saw a show where they'd follow someone on a beach vacation. This time it was a female photog****r who was looking for models who wanted to pose nude. She had a hard time finding someone but of course she did find a girl. The girl however wasn't planning to do the nude photo's. The photographer said to the camera that she was sure the model was going nude for her, she just didn't know it yet.
Eventually she got the girl as far as losing her top. The photographer was happy she got her this far, but she wanted more. The girl said topless was really as far as she would go. At the last shoot the girl did go all the way and she was convinced it was her own idea. Of course that was the intention of the photographer all along. She just had to manipulate the girl a bit.
The reason I bring this up is that most models don't start out as nude. They are NN models, main reason because you can't pose nude when you're 14-16 (well not in America). However the photographer knows when he first recruits the girl that in 2-4 years she will spread her legs. So if that's the intention when you're scouting for models, I'd figure a photographer would use his mutant manipulating powers for some pysical action as well.
Of course I have no idea how a shoot works. I'm a simpleton who thinks it's just a girl and an old dude with a camera, but I guess it's not as romantic when there's a make-up girl, light guy and wardrobe lady as well.