Bishōnen is a Japanese term literally meaning "beautiful youth (boy)" and describes an aesthetic that can be found in disparate areas in East Asia: a young man of androgynous beauty. This word originated from the Tang dynasty poem Eight Immortals of the Wine Cup by Du Fu. It has always shown the strongest manifestation in Japanese pop culture, gaining in popularity due to the androgynous glam rock bands of the 1970s, but it has roots in ancient Japanese literature, the androsocial and androerotic ideals of the medieval Chinese imperial court and intellectuals, and Indian aesthetic concepts carried over from Hinduism, imported with Buddhism to China. Today, bishōnen are very popular among girls and women in Japan. Reasons for this social phenomenon may include the unique male and female social relationships found within the genre. Some have theorized that bishōnen provide a non-traditional outlet for gender relations. Moreover, it breaks down stereotypes surrounding feminine male characters. These are often depicted with very strong martial arts abilities, sports talent, high intelligence, dandy fashion, or comedic flair, traits that are usually assigned to the hero/protagonist role.

Effeminacy or male femininity is the embodiment of feminine traits in boys or men, particularly those considered untypical of men or masculinity. These traits include roles, stereotypes, behaviors, and appearances that are socially associated with girls and women. Throughout history, men considered effeminate have faced prejudice and discrimination. Gay men are often stereotyped as being effeminate, and vice versa. However, femininity, masculinity, and other forms of gender expression are independent of sexual orientation.