Conversation overheard on the quay
The scene: the quay. Your narrator is discovered overtaking four children, who appear to be about 12 years old; 3 girls and 1 boy.
Which taught me something, although what, I'm not sure.
Girl: ...He's always asking me to go out with him, even though he knows I'm going out with you...
Another Girl: You can't go out with him! He's the half brother of your cousin... no.. you're his... no wait...
Third Girl: Did you hear? There was this girl and she married her grandfather, and they had sex, and he died and they had babies!
Which taught me something, although what, I'm not sure.