So you think to yourself, "I am an adult." After all, you have a mortgage, two kids, a good marriage, you've even paid off your school loans. You must be an adult now. Or you were until you sit down to coffee with friends you haven't seen in half your lifetime and become 17 again. Where did the years go? Was anything ever as funny as rear ends or sex? Apparently not, because it's all you can talk about for 2 hours.