What does a man's pouting expression mean?

Maybe he's coquetry to gain your sympathy.

Basic introduction of expression pack:

Expression packs are essentially a popular culture. Relying on the continuous development of social and network, the way of communication between people has also changed accordingly. From the earliest written communication to the use of some simple symbols, emoticons, emoticons and expression packs, it has gradually evolved into an increasingly diversified expression culture, using some self-made and popular element pictures to communicate.

Most of these pictures are funny and exaggerated in composition. By collecting and sharing these pictures, people can have fun and show their hidden pictures, which can be recognized by people and achieve psychological satisfaction.