If at first you don't succeed, destroy all evidence that you tried.

If at first you don't succeed, skydiving is not for you.

If Barbie is so popular, why do you have to buy her friends?

If ignorance is bliss, you must be orgasmic.

If you can read this, I can slam on my brakes and sue you!

If you can't convince them, confuse them.

If you choke a smurf, what color does it turn?

If you get to it and you can't do it, well there you jolly well are, aren't you.

If you haven't much education you must use your brain.

If you lend someone $20, and never see that person again; it was probably worth it.