"A sexually inadequate husband who accepts his wife's $#@! is her solely property and she alone decides which men she will $#@!,even if it means denying her husband. His only access to her $#@! is to clean it of the ejaculate of males she chooses to $#@!".
Maybe you could ask more correctly, who ARE they? In this context, "They" is simply rhetorical and refers to no one in particular. Perhaps, "It is said........." would have been more appropriate.