"Well Bill, we don’t allow adults to date children for the same reason we don’t allow adults to sell them cars or alcohol: they are not at a point where they have their faculties sufficiently in place to enter into contracts and to make adult decisions. They are more easily coerced, and thus need protection."
Hopefully, that is the main reason but it is also because their bodies are not yet developed enough & are too vulnerable to injury.
"Yes, without god telling Blankshaen that having sex with a child is bad, he’d be a-ok with it. It wouldn’t occur to him, on his own, that protecting children from being used by adults would be a concern. This is the man who presumes to call others immoral. It’s not a concern for harm that makes morality, but arbitrary rules handed down from god."
IF most theists were somehow convinced there are no gods after all, according to them, they would then have no morals. How utterly depraved they must be if foolish faith in something they cannot know is all that prevents them from rampaging rape, murder, sex with children, etc etc.