"I more or less think that it's okay as long as the child in question has a sufficiently mature understanding of the whole idea of sexuality to consent and there isn't any question of coercion or undue influence from an authority figure."

The depressing thing is that I've actually heard that argument being used in my presence, along with "I'm only trying to help this poor child by providing emotional presence/I really care for them/I'm a subtitute for their neglectful family."

Now I remember why I went quite depressed two years ago, hanging around those sort of people.