Oldjones, I bow to your supperior knowlege of the Criminal Code of Canada. However, I'm still supprised that a good Constable and Crown Attorney can't make it rise to disturbing the peace or whatever disorderly conduct is under the Criminal Code.
Further, I'm really not dealing with: how likely is it that. . . Rather: If I decided to charge you. . . .
I think it would depend on his conduct. Plainly serious artists are entitled to ask models to pose nude. It cannot possibly be a crime.
It may be offensive to ask random strangers to do it, but in and of itself it cannot be illegal.
Now if he PERSISTS, or if it's the latest thing in a series of sexual requests, then it could easily rise to the level of some sort of harassment. So the key is going to be in the execution.
Alternately if it's an obvious cover for soliciting a prostitute it would not take a jury long to make his true intentions a judicial fact and have him up on a solicitation charge.
"Excuse me, miss, I don't mean to embarrass you but I'm a photographer and I'd love it if you would model for me some day. Here's my card. My specialty is nude photography, the rates I pay are on the card, if you think it's something you could do just give me a call and we'll arrange something. I hope I haven't offended you."
Can't see how that's criminal, assuming that you respect the "hell no" that most women will give you.