He's gross, she's got cooties. That's just how its supposed to be. He hates dumb tea parties, and she won't climb a tree. It's a boy and a girl thing. A girl and a boy thing. She'll stop wearing pig tails, get the braces off her teeth. He'll stop making faces, start saving her a seat. It's a boy and a girl thing. A girl and a boy thing. She'll start wearing makeup and he'll start noticing the curves . He'll get a little nervous, when she's with him and he's with her. Is he gonna kiss me? Wonder if she wants me to. Awkwardly embarassed, not sure what to do. It's a boy and a girl thing. A girl and a boy thing. They'll throw around "I love you"'s, start making plans to say "I do". Start a brand new life together And probably have some babies too. They'll fight and act like children. Make up like they're 17. And even when they're 80, it's still gonna be A boy and a girl thing. A girl and a boy thing. A girl and a boy thing. A boy and a girl thing.