Little Johnny and $20

 Little Johnny came running to his mother one afternoon and demanded $20. The mother asked, "What for?"

Johnny said he will tell that later but demanded that he should have $20.

The mother said, "No I won't give you".

He was pleading for a while and suddenly said; If you give me $20 I will tell you what dad said to the maid while you went on shopping the other day".

The mother was a bit worried and gave him the $20, and then asked, what dad said to the maid?

Johnny; "Dad said to the maid that she should iron his shirts thorough without wrinkles next time."