There is no female nudity but women often wear low-cut dresses meant to emphasize cleavage. A scene takes place in a old-west brothel. Women wear period-style lingerie which is pretty mild.
Two women sexually assault and almost rape a tied-up man. It should be noted that this is done is a comedic fashion. The man's behind is shown. There's no female nudity aside from cleavage.
A man's bare butt is shown for about 1/2 second. There is a male bondage scene where a man gets tied up by two women and pose for pictures, but it is played for laughs and is really more comical than sexual.