Not exactly true. Like the US, Mexican states have their own ages of consent (mostly 12, many 14). Clearly, Mexico's ages are quite a bit lower than the US ages (16 in most states, 17 and 18 in the rest), but I have an intellectual appreciation for the standard in a few Mexican states (provinces?): it's puberty, rather than some arbitrary number. (Bolivia may also have this standard.... depending on the reliability of quick wikipedia searches.) The day that Mother Nature says you're ready, you're clearly going to have some major conversations with your parents about what is going on with your body, and how it can impact your life. Further, many cultures worldwide have coming-of-age traditions for early teens (bar mitzvah at 13, etc), and choosing a starting point that is actually specific to the person, and has a rational basis in biological realities, seems wiser than randomly declaring a number that the majority of citizens simply "feel good" about to be the legal standard.
(Note: I am NOT advocating this for the US!! Keep the hate-messages and libelous posts to yourself. Just saying that there is some reason and logic to their choice, even though it is unusual for our culture.)
Also note: Most of Europe is 14 or 15... 13 for Spain, but one story says they're raising it soon
Most of South American is 14, Argentina is 13...
China is 14...
(And yes, 6 is pretty f***ed up, and he deserves some significant jail time... preferably in a rougher jail than the US might provide. I have long said that we should contract out incarceration duties to neighboring nations.)