I was actually serious about your travelling. It sounds like quite the adventure.
And isn't it just a number? Some people are a lot more mature than others. Some 30 year olds are more childish than 15 year olds. The day you hit 18 shit becomes legal.. But how does that one number justify your maturity? If you post pics 1 week before your 18th it's considered bad, but if you do it at 12:00:01 you're legal and fine.
Yes it is a number, but the line has to be drawn at some point, 16 is too young, 17 maybe, 18 yeah.
I agree, as i have mentioned a couple of times, there's exceptions to the rules, there's 18 year olds who look 14, and there's 18 year olds who look 24, but on average, as a law tends to apply to everyone, I personally agree with the age at 18.
I was 17, and 16 and all the other ages (obviously

) and I did stupid things, that now, at my age, I wouldn't dream of doing, so you could argue that why not increase the age even more, to 21, or 25? Just to make sure?
The fact is that people have obvious sexual urges but those majority who are under 18, and not mentally, hormonally and/or physically mature need to wait.