You said, "The proper thing would be to make it illegal to coerce or force someone to take or share intimate photos of themselves (irrespective if their age)". That sounds like you meant that there should be no age at which it's categorically illegal to take pornographic pictures of someone. And it doesn't match up at all with what you're now describing. If your point is simply that the ability to consent to sex should also confer the ability to consent to porn, or that the proper age of consent for porn should be below 18, that didn't come through at all in your previous post.
I guess i should've been more specific in that regard. Yes, if it's illegal to have sex with someone under a certain age then it seems quite straight forward for it to be made illegal to make or distribute images depicting them having sex or being in a sexual situation. Although i should note that there still is a legal exception in case the person who takes the photos are close to the same age and development as the underage person being depicted, so that even in principle there's no possibility for someone to be punished for taking benign images of their boyfriend or girlfriend.
Generally speaking, with a few exceptions, sexual abuse and rape committed against those at least 15 year old are treated the same as they would with adults. For example: raping a 15 year old typically falls under the criminal offence of "rape", as opposed to "rape of a child". Note that this also applies if the rapist wasn't aware that their victim was under 15 at the time, although in terms of sentencing this changes nothing.
One exception that rule is that, while it's absolutely illegal to "promote or exploit the fact that a child under fifteen years old performs or participates in sexual posing", it only applies to those above the age of 15 "if the posing is intended to harm the child's health or development." In practice this would apply to strip clubs for example, or if they have been threatened, pressured or forced into it. It doesn't apply at all to adults.
A two year old can consent to sexual relations?
No. No, they cannot. There isn't a two year old in the world prepared for that.
Children includes everyone under the age of 18, although i realize that some people use this only to refer to young children which is still a very vague term.
By saying that children can consent to sex I'm not saying that
all children of any age can consent to sex, I'm merely saying that there are children that can consent to sex as opposed to saying that no child can consent to sex, which is what you seemed to be implying.
I'm fine with debating where exactly the line should be. But there's still got to be a line, which your prior post seemed to argue against.
I wouldn't necessarily argue against a legal red line. I would argue against said red line not only determining whether something was a crime, but also it determining whether any and all acts that crossed said line are inherently abusive and exploitative. I don't need to assume the latter to justify the former.