No, the children don’t get a say in the matter.
If you offer a kid a lolly if it will lick your ***** for the camera and the kid says yes, then it’s OK?
Like I say, keep it simple, if adult, ie reproducing age, they have the only say that matters. If younger then it’s down to those responsible and in control of them - but you can’t they’re responsible, have power and in the same breath deny them that responsibility and power based on what YOU deem appropriate. For example many Americans feel it is OK to mutilate a little baby boy’s genitals and call it “circumcision” but those same Americans recoil in horror when Africans mutilate a little girl’s genitals and call it “circumcision”. They’ll argue about which is “worse”, mutilating little boys or mutilating little girls, while seemingly ignorant of the principle behind mutilating little children’s genitals, of either sex, be it minor, major or just cut their heads off and kill em why doncha?
My own view is leave their bits alone until they’re adults and let them choose if they want bits of themselves amputated - but I wouldn’t force you NOT to because they’re your children, not mine. Come anywhere near MY son with a scapel and you’re life would be at risk.
It’s a great example actually - anyone who claims you don’t own your children, how would you feel if I decided to circumcise your 6 year old daughter? If I give her enough lollipops and painkillers that she doesn’t object or even agrees, do you get a say in it or not? If you DO get a say in your daughter being mutilated - then by definition you get a say in your daughter being mutilated, geddit? To say “I do get a say but only if my say is no” doesn’t make sense.
If you’re allowed to physically mutilate your children I don’t think it’s a stretch to say you can photograph them. If the pics are digitised then there’s no “scarcity” so if I take pics of your daughter naked and post them on the internet is that any business of yours or not? IF you can claim intellectual property and IF you own your child then yes, if not then no - but again, please don’t ask me to accept that you believe 2 different things at the same time.