Couple's feelings test sheet

Foreign merchants are really interesting, they designed such a bed sheet to test the feeling of a couple. There is a ruler printed on the bed sheet, and there are numbers on the emotional ruler. The numbers extend from the central line to the outer line, getting bigger and bigger. Moreover, the color of the numbers also changes from warm color to cold color. In this way, the relationship between couples can be tested by the distance between them when they sleep. Haha, this is absolutely a game, an interesting game. Can the relationship be tested by this?