23 13 One person said to another, "Do you know? Soap was actually used for bathing hundreds of years ago. " What do you mean?

What the man said is obviously that the use of soap has changed, not a tool or object for bathing. In other words, the main body of this joke should be soap, not bathing.

Recently, a joke about being a soldier was popular on the Internet, saying that a male soldier dropped his soap while taking a bath. He bent down to pick up the soap, as if waiting for the chrysanthemum to explode.

Combined with this joke, I feel that in 23 13, soap is no longer used for bathing, but has become a tool for sexual suggestion between men, so the man will be surprised and say that soap was actually used for bathing hundreds of years ago.