That's "Autodidact" To You

Overheard in the car:

Ben's friend: "Ben, how do you know so much?"

Ben: "I'm self-taught."

Because They're Better Than One...

Eli was scratching his head.

"Forehead..." he remarked thoughtfully as he rubbed; then, moving his hand onto the top of his head, he said, "One head." He paused a beat, his hand still, thinking.

"Mama? Why two heads?!"