Is it true about the hidden rules about the guide sleeping with him? If it is true, can you survive without doing these disgusting things in this environment?

It's not true. I haven't heard of a tour guide sleeping with him. The key to being a tour guide is to have strong professional ability, be familiar with the scenic spots, be able to arouse the mood of the group members, and be enthusiastic to help the group members solve the problems during the tour. I know several tour guides, and they are all like this. Therefore, the unspoken rule of the so-called tour guide sleeping with him is false. It may exist in some cases, but it is by no means a common phenomenon. You can exist without doing these disgusting things.