There is a story about a man who saw two women check in at a hotel. After finding out their room, he called the room to ask if he needed service and got a tip after one night.

A friend went on a business trip and checked into a hotel in the south gate. He is alone at night. Lonely, you know. Then he wandered around the hotel yard. After a while, he was a little tired, so he was going back to his room. When he went to the hall, he saw two beautiful women checking in. According to him, they are both in their mid-twenties. My buddy is so talented that he followed others upstairs, then secretly wrote down their room numbers and went back to his room. After more than an hour, at about 1 1, my buddy called two beautiful women's rooms and said, "Hello, madam, what can I do for you?" Unexpectedly, the other person was silent for about ten seconds, and then said, OK, let's look at two. My buddy was so happy that he went up immediately. When he entered the room, the beauty asked, "Why are you alone?" My buddy replied professionally that there are three people here. One asked for leave today, and the other found a job, leaving me. The two beauties said ok. Then, have sex, have sex. ......................................................................................................................................................................

Enlightenment: There are many ways to achieve the goal. The conventional approach is never to maximize the benefits, but to find another way.