Some believe that masculinity is linked to the male body; in this view, masculinity is associated with male genitalia. Others have suggested that although masculinity may be influenced by biology, it is also a cultural construct. Many aspects of masculinity assumed to be natural are linguistically and culturally driven. It is argued that masculinity does not have a single source. Although the military has a vested interest in constructing and promoting a specific form of masculinity, it does not create it. Facial hair is linked to masculinity through language, in stories about boys becoming men when they begin to shave.