[Boudica]

I've watched a lot of films where SEing is included in films, but it's often not directly called that in the movie/show. The only one I can think of off the top of my head is one from Sherlock Holmes (the TV show with Cumberbatch)

Spoiler:

Sherlock seduces, proposed and gets engaged to a woman, purely to access her bosses office. Typical Sherlock move, but 100% nailed that SE.