What is the stalk of melting chocolate in the knee?

One of them said that he could describe his great performance or practical skills by melting chocolate in his knees. There is no practical point in melting chocolate with your knees. It's a joke, a joke or a stalk. The source is a funny text circulating on the Internet, in which one person said that he could melt chocolate with his knees to describe his strong expressive ability or practical skills. Generally speaking, this is a common network language or phrase.