Old people always say that people who like to forget things eat forgotten yolk eggs. What are forgotten yolk eggs?

Haha, I am actually talking about eggs that have not been collected by roosters but have been thawed! Of course, no chicks can be hatched. This kind of egg is called a forgotten yolk egg! ! ! But this kind of egg is very delicious. Of course, you won’t have a bad memory after eating it! It’s just a saying that old people are used to! Haha