I'd assume that the amount of love you have for the person you're having sex with would add to the boredom you percieve within this action... I guess if you feel good just spending some time with someone, you'd feel great engaging in... uhh... naked activities with them.
But people in high school do tend to be way too obsessed with it. I guess it's because most of these people have just discovered that they can now put their private parts with those of other people.
People talk about their [unhealthily active] sexual relationships with other people so casually, it honestly sounds like they're talking about going out jogging with these people or something.