"Funny Thoughts" joke

Tell a man that there are 400 billion stars and he'll believe you. Tell him a bench has wet paint and he has to touch it.
How come Superman could stop bullets with his chest, but always ducked when someone threw a gun at him?
Why does sour cream have an Expiration date?
Do infants have as much fun in their infancy as adults do in adultery?
What would a chair look like if your knees bent the other way?
If "con" is the opposite of "pro," then what is the opposite of progress?
Why is lemon juice mostly artificial ingredients but dishwashing liquid contains real lemons?
How much deeper would the ocean be if sponges didn't grow in it?
Why buy a product that it takes 2000 flushes to get rid of?
Why do we wait until a pig is dead to "cure" it?
Why do we wash bath towels? Aren't we clean when we use them?
Why do we put suits in a garment bag and put garments in a suitcase?
Why doesn't glue stick to the inside of the bottle?
Do Roman paramedics refer to IV's as "4's"?
Whose cruel idea was it for the word "lisp" to have an "s" in it?
What do little birdies see when they get knocked unconscious?