Ghostbusters (1984)

When Vinz Clortho arrives at Dana's apartment for his reunion with Zuul the pair immediately share a passionate embrace before ascending up a secret staircase to the rooftop. When the film cuts back to them, they lay resting atop a large stone table with their clothes disheveled and Vinz awakes with a huge smile and his broken belt dangling between his legs.

Example of:
G-Rated Sex