Grammar: It's the difference between knowing your shit and knowing you're shit.
Where do you learn to make ice cream? -- Sundae school.
Why didn't the bear go to college? -- Because bears don't go to college.
I wanted to learn how to drive a stick shift, but I couldn't find a manual.
Today I learned humans eat more bananas than monkeys. -- I can't remember the last time I ate a monkey.
Why do shepherds never learn to count?
Because if they did they would always be falling asleep.