Hentaismile -
Thick outlines for the mouth help the expression pop against the rest of the face.
Furthermore, the rise of image-sharing platforms like Pixiv, Danbooru, and Twitter (X) allowed this specific aesthetic to go viral. Artists often use the "smile" as a stylistic signature, leading to dedicated tags and communities centered solely around this facial aesthetic. Influence on Internet Culture and Memes hentaismile
Many Virtual YouTubers (VTubers) incorporate similar exaggerated expressions into their 2D avatars to elicit specific reactions from their audience. Thick outlines for the mouth help the expression
