If you are traveling, and there is any possibility you will engage in any sexual activities outside your home area, it is a good idea to check the destination's laws. If you forget this and just assume they are the same, you can get screwed (no pun intended), regardless of if the age of consent is higher or lower at your destination.

If it is higher, you might inadvertently commit statutory rape with someone who is clearly old enough back home and so doesn't trigger your "do an age check" alarm.

If it is lower, you might run afoul of laws back home against against sex tourism.

(Pay attention to recreational drug laws, too. Sex and drugs are both things that are taken vary seriously. Most other things tourists might do aren't nearly as risky--nobody except maybe Singapore is going to make a big deal of it if you, say, improperly dispose of a food wrapper or something like that. Oh, and also be careful with religion).

The age of consent is 16 in 31 US states and the DC (including Massachusetts). It s 17 in 8 states. It is 18 in the remaining 11 states.

It's 18 in Mexico, 16 in Canada, ranges all over the place from 14 to 18 in South America, 13 to 21 in Asia, 14 to 18 in Europe, and 11 to 18 in Africa.

It also varies widely whether or not places have close-in-age exceptions (also known as Romeo and Juliet laws). Such an exception might, for example, might say that in a place with an age of consent of 18, a 16 or 17 year old can consent to sex if the other participants are under 21. Don't assume that because you are young that you don't have to worry about other young people's age.

Finally, it also varies widely by what kind of sex. There are places where they have close-in-age exceptions, but only for heterosexual acts, and so a 17 year old girl with a 17 year old boy is fine, given an age of consent of 18, but a 17 year old boy with another 17 year old boy is statutory rape by both of them because the close-in-age exception doesn't apply.