Children are often forced by social structures and individual agents into situations in which adults take advantage of their vulnerability and sexually exploit and abuse them by selling them or selling their bodies. Structure and agency commonly combine to force a child into commercial sex: for example, the prostitution of a child frequently follows from prior sexual abuse, often in the child's home. Many believe that the majority of prostituted children are from Southeast Asia and the majority of their clients are Western sex tourists, but sociologist Louise Brown argues that, while Westerners contribute to the growth of the industry, most of the children's customers are Asian locals.