Are you my appendix? Because I don't understand how you work but this feeling in my stomach makes me want to take you out.
I don't understand why people get attacked by sharks.
Can't they hear the music?
Dustin and Jane (both blonds) were delighted when finally their long wait to adopt a baby had come to an end.
The adoption center called and told them they had a wonderful Russian baby boy, and the couple took him without hesitation.

On the way home from the adoption center, they stopped by the local college so they each could enroll in night courses.
After they filled out the form, the registration clerk inquired, “What ever possessed you to study Russian?”
The couple said proudly, “We just adopted a Russian baby and in a year or so he’ll start to talk. We just want to be able to understand him.”
What do you call a bee you can't understand? A mumble bee.
A hydrogen molecule gets arrested.
His mother comes down to the police station to bail him out. She is met by the detective working the case.
I don’t understand it, says the mother. Hydrogen was always a good kid. I never had any problems til he met oxygen.
Don’t worry, says the detective. The situation is fluid but he won’t be charged.
I got a C in Physics and my parents grounded me.
They say I don't understand the gravity of the situation.
A person who fixed a problem that you don't know you have, in a way you don't understand.
"As has often been noted, physics is to math what lovemaking is to masturbation."

Student : "So you're saying both fields are good, but without an attempt to understand the universe, the search for deeper mathematical truth is empty?"

Professor : "I'm saying you'll spend most of undergrad doing math."
Of course I talk like an idiot, how else would you understand me?
I can explain it to you, but I can’t understand it for you.
I can explain it to you but I can't understand it for you.
I'll explain and I'll use small words so that you'll be sure to understand, you warthog-faced buffoon.
(From movie The Princess Bride)
What do you get when you cross a lawyer with the Godfather? An offer you can't understand.
What do you get when you cross the Godfather with an attorney? An offer you can't understand.
My son just said to me that he doesn't understand cloning.
I said, "That makes two of us".