A woman prepares to consummate her marriage. While doing so her breasts can be briefly seen. After her new husband enters the room to consummate we see nothing else.
A psychiatrist is having an affair with a woman who may be one of his patients.
Because Jack (Peter O'Toole) believes he is Jesus, he assumes he can blurt out anything he wants to matter how vulgar or outrageous, so he very carelessly makes references to sex. This is played for laughs.
Jack's improvised wedding vow begins "From the bottom of my soul to the tip of my p*nis"... This may offend people who feel that a character who believes himself to be Jesus Christ should not say that, but the moment is also played for laughs.