What is the sexual double standard? Has this double standard changed over time? Where else does a double standard based on gender exist in society? Incorporate a related example, such as a news piece,...

What is the sexual double standard?  Has this double standard changed over time? Where else does a double standard based on gender exist in society? Incorporate a related example, such as a news piece, in terms of double standards in society.  Please include a link for the source; a full citation is not required.