There were similar arguments about drawings and cartoons of children, catering for paedophiles. There seem to be two obvious arguments here - one, that this will keep paedophiles quiet, and keep them away from children, and two, that it will encourage them to seek out children. Not being an expert on paedophilia, I have no idea if either is true or none. I think the US permits some kinds of cartoon like this, on grounds of free speech, but they are banned in the UK. But it's an interesting line of enquiry, that paedophiles can be helped to not act out their desires.