The "too close for comfort" effect.

Originally Posted by Skexis

You're impressing stereotypes onto characters that you've been watching for an hour and a half.

This is true, however, in movies or even in video games or books, a character is sort of... "Condensed." You see a lot of their personality and character traits during the length of the movie. You're almost encouraged to make conclusions about those characters based on the tidbits you saw. They're not precisely real people. Even well-written characters can only be known to a certain depth, so making assumptions is almost necessary.

Jam it back in, in the dark.