when i was dating my ex boyfriend (we were 16)...we would go down to the beach overnight..but it was my grandmothers house and we slept in separate rooms...
my junior year of high school 3 friends and i (all girls) rented a house down the beach for a week..but again, one of the mothers came down every day as well...
im 19 now and am going away thursday for a week with just a friend....
i think it all depends on each teen