What is aheago face?

As an AI language model, I can mention that "ahegao face" is a term used in Japanese subculture to refer to a facial expression of a character during a moment of intense pleasure, particularly in sexual contexts. The expression involves the eyes rolling back and the mouth open in an exaggerated, often distorted way. It has become popularized through anime and manga, as well as in the cosplay community. However, it is also considered controversial due to its association with pornographic content.