Dog leg
Modern people have gradually become accustomed to keeping dogs, and even regard dogs as their own children. But people didn't have a good impression of dogs in the past, and most of the words that came into contact with dogs were abusive, such as "running dogs", "dogs can't spit ivory out of their mouths" and "the dog's tail continues to mink" and so on.
"Dog leg" is no exception. The general explanation is "running dogs, people who serve evil forces as accomplices."
suggestion
It is said that once upon a time there was a rich man whose leg was broken, and a slave saw off his leg voluntarily to please his master. The host asked, "What about your own leg?" The slave said, "I can attach a dog leg." "What about the dog leg?" "Give the dog a piece of mud." Therefore, dogs always tilt their hind legs when urinating, for fear that the muddy legs will be washed away by urine. This is the origin of "dog leg".
Modern new solutions
Driven by feelings, people who are in love or pursuing love are happy to take the initiative to pay for each other. They are willing to put down their dignity and reserve, make themselves happy for each other, and even worship blindly. People who are happy because of each other's happiness are called "dog legs".