People like to see other people happy, also they like to relate their lives to films and hope they get the same outcome
For the excitement, for the adventure, for the love between two people, for the heroes, for the noble deeds involved, the setting of the movie ...
Because it so romantic to watch other how they met and fall in love and what they are willing to do for love.
Bec. It inspire them what is true love really all about
Because it romanticize their romantic feelings.
Because the romantic movies resembles to their real lives.
Because they love to be romantic, that's why they watch romantic movies.
It makes them happy.
Not all the people love to watch Romantic Movies but Teenagers are much more curious about Romantic Movies.
I think its because its about love and some might enjoy seeing it