Growing up I was curious about what statutory rape meant in British Columbia (where I lived) so I tracked down the law.

As best as I can remember, it gave a graded set of rules about what was and was not legal. Basically any adult with a kid below 14 was illegal. (Kids with kids was allowed.) From 14-18 there was a gradation of what was and was not allowed. As I recall from 16-18 there was only a problem if the adult was an authority figure. From 14-16 it depended on how old the adult was, and how much of an authority figure. (A teenager working at summer camp had more restrictions than a teenager in the same school.)

I remember liking the key principle that for questions of mutual consent the relative power between the people makes a difference.

I would remember in more detail, but I stopped being so curious when I figured out that 19 and 16 wasn't a problem...

Cheers,
Ben