Find the best joke

A certain beauty decided to spend a lot of money to lose weight. After spending more than 100,000 yuan, she felt very satisfied!

On the way home, she bought a newspaper at a newsstand. When she was looking for money, she asked her boss: "Excuse me, how old do you think I am?"

The boss said: 23.

She is so happy: 37!

Then she went to sell pawns and asked the lady at the counter the same question.

The lady said: I guess 21.

She was so happy: No, she’s 37!

Exuberantly, she went to the Uni-President Supermarket on the corner to buy a pack of chewing gum, and couldn’t help but ask the lady at the counter there.

The lady said: Well, I guess 19.

She was so proud: 37, thank you!

While waiting for the bus, she asked the old man next to her again.

The old man said: I am 78 years old and my eyesight is bad and I cannot see clearly. However, there is a way to be sure when you are young.

If you let me put my hand into your bra, I can definitely tell your age!

There was silence for a long time, and on the empty street, she finally couldn't help but be curious: Okay! You give it a try.

The old man put his hand into her shirt and then into her bra, and began to explore slowly and carefully.

A few minutes later, she said: Okay, how old do you think I am?

The old man squeezed it one last time and took out his hand. Say: Madam, you are 37 years old.

The beauty was taken aback and asked in surprise: How amazing! How did you know?

"Promise you won't be angry?"

"Don't be angry!"

The old man's answer made the beauty faint:

The old man said: At McDonald's, I'm in line behind you.

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