R47 But saying it's not a case-by-case basis goes against everything we know from developmental psychology. People don't suddenly turn sexual overnight once they hit 18. Claiming otherwise would be saying Earth's rotation around the Sun somehow has magical powers. The same number currently applies to everyone in a particular country because that happens to be an efficient legislative and judicial solution.
I found the age of consent set at 16 way too high when I was 15, but now find it acceptable. When I grow older, I'll probably find it too low. There simply isn't one perfect magical number that people will ever agree on. Also, saying Italy's age of consent laws are not as good as American laws just because... well, they aren't American, is highly problematic in itself. I mean, you're entitled to that opinion, but the rest of us can also hold an opinion that you're a nationalistic prick.