Much sexual dialog by all five couples throughout the movie.
Lisa and Larry undress to underwear, he removes her bra, they have sex, but nudity hidden by sheets.
Lola and Mark strip down to underwear. She later removes her bra and shows breasts as they begin to make out. She is later seen topless in bed with him while they talk, then have sex.
Tracy and George undress to underwear and make out.
Charlene and Skip grope one another, undress to underwear. He removes his underwear showing off his bare rear.
Marlene and Charlene are standing in front of Skip and Max, holding up a sheet. They drop the sheet, exposing breasts and Charlene partial rear.