Sci Fi movie's and television regularly include romantic interactions; without more details it is hard to narrow down which show you are trying to find as there have been dozens over the years. These are just a few sci fi films and tv that come to mind that included seduction themes:
On tv: Star Trek regularly includes sexual themed or seductive plot lines; though they are never explicit. Battlestar Galactica also included seduction plot lines.
As for movies: Barbarella (1968), The Man who Fell From Earth (1976), Saturn 3 (1980), Cat People (1982), Starman (1984), Cocoon (1985), Moonraker (1979), Star Trek First Contact (1996), Avatar (2009), Supernova (2000)
There are many more, possibly hundreds more if you include Anime (Japanese animated films)
This particular movie was entitled "Cisne Negro", being a literal translation from the original title.
Veggiefails
Communion, based on the book by Whitley Strieber.
Deliverance is a movie title that starts with "D".
"Cardcaptor Sakura: The Movie" is the title .
Kissing a fool
Armageddon
This particular movie was entitled "Cisne Negro", being a literal translation from the original title.
This is my Time
Elephant Man
Veggiefails
There was a movie with "she wolf" in the title. The movie actually has nothing to do with a wolf. It has something to do with Nazis and being a prisoner.
There is no "Warcraft 3 movie" but there is a Warcraft Movie being made still in development. http://www.imdb.com/title/tt0803096/
Apollo was the title given to the American three man spacecraft.
first movie's title is "naruto shippuuden the movie" nd second's title is "bonds"
Communion, based on the book by Whitley Strieber.
Bildinajums is a Latvian equivalent to the title of the movie 'The Proposal'.