Very early on Margaret changes out of her swimsuit and her breasts are shown briefly. The camera focuses on a c-section scar.
Margaret and Joe go skinny dipping. His butt is shown. She keeps her bra and panties on.
Margaret comforts Joe in the bath--she's clothed, he's naked, no nudity shown. She washes him a bit and then gives him a handjob. I'ts not directly shown but is clear from movement and sounds and reactions.
Joe is shown having sex with another woman, her breasts are shown, and Margaret watches them briefly through the open door.
Margaret is shown in the bath. Joe enters and they have sex. Her breasts are shown clearly before and during.
Margaret & Joe are shown waking up in bed together naked. Her bare breasts & bare pubis are clearly shown while Joe looks at her c-section scar & when Joe gets up out of bed a darkly shadowed frontal is briefly glimpsed.
There are a few scenes of erotic asphyxiation--both auto-erotic and partnered.
Joe trails his fingers against Margaret's clothed breast. She laughs this off before going to bed alone.
Joe uses the shower, rear nudity.