At the 3:38 mark in the below teaser trailer from Immaculate Conception, Oona Chaplin's left breast is briefly visible during a sex scene. The scene is very dark, but some brightening reveals that it is there. There is also a brief butt shot a few seconds, but there is no way to know that it is her. More information (and a longer trailer) can be found here. According to the uploader the trailers were put together to create interest for the script.