Susan Sarandon & Barry Bostwick, The Rocky Horror Picture Show
One of Hollywood's strangest cult obsessions is The Rocky Horror Picture Show. The play made into a movie is known for one particularly racy scene: the "Touch-a Touch-a Touch Me" song. Leading couple Janet and Brad get caught up in the heat of the moment while also in the center of an elaborate musical number. There's a reason your parents probably didn't let into see this flick, or any of its remakes.
Doug Jones & Sally Hawkins, The Shape of Water
The most shocking part of this gritty and odd Guillermo del Toro film was definitely the interspecies sex scene (yes, you read that right.) Audiences weren't expecting a quiet young woman to fall for a fish-man, but it happened in a very sincere way. It made it all the way to the Oscars for its...unique plot. There certainly hasn't been a film like it ever before or ever since.