"In love relationships, there is a fine line between pleasure and pain. In fact it’s a common belief that a relationship without pain is a relationship not worth having. To some, pain implies growth, but how do we know when the growing pain stops, and the pain pains take over? Are we masochists or optimists if we continue to walk that fine line? When it comes to relationships how do you know when enough is enough? — Carrie Bradshaw (Sex and the City)"