There's a big difference between falling in love with someone and falling in love with someone and getting married. Usually, after you get married, you fall in love with the person even more.
A successful marriage requires falling in love many times, always with the same person.
Red is such an interesting color to correlate with emotion, because it's on both ends of the spectrum. On one end you have happiness, falling in love, infatuation with someone, passion, all that. On the other end, you've got obsession, jealousy, danger, fear, anger and frustration.
I think that one of the things that you do learn is that falling in love and being in love with someone is a rarity. That you don't fall in love as many times as you think you're going to. And then when you do, it's really special; it's really important.
Falling in love, romance, matters of the heart - when you fall in love, on some biochemical level you know there is a chance it won't work out. It's ingrained in us that if you take such an enormous risk on someone with your heart that it might not pay off. I gamble all my chips and I might actually lose everything.