So I've been thinking a little about love. When should you introduce a romance and how fast should it progress? What is the difference between a "romantic subplot" and a "romantic plot tumor?    One thing I've determined is that love is almost present in every story you read. This doesn't always mean romantic love. When I think of love, I like to think of the way the Greeks thought about it. The Greeks had 4 separate words for love.     1. Eros is the word we'd associate love with today. It's