One of the movie's main sub-themes is infidelity, as Bill Paxton's character, who is married and has 3 children, cheats on his wife while in Vietnam. There, he can be seen flirting and kissing with 2 or 3 different women (no nudity or sexual intercourse is ever pictured). There is also mention of him having harassed his children's 15 years old babysitter, who then sued him for molestation. In one scene he tells his friend that he is in love with an Asian girl he just met, and his friend jokingly asks him "how old is she? 17?", making this a reference to his predilection for underage girls.
A man can be seen lying in bed wearing only boxers.
A few children can be seen naked on the streets.
Many prostitutes can be seen in Vietnam's streets, trying to hook up with American soldiers.