Liar competition.

A husband tells his wife that, "there is competition for lying. Whoever tells a big lie will win a prize. Why don't u participate in that? "

"I won't take part in the competition" replied wife.

"Why?" asked husband.

"Because neither me nor my family members lied in our life and we don't know how to lie," replied wife.

The husband suddenly said," That is why I asked u to participate. Your statement will be get u first prize"