"You say that romantic love is stronger than our sex drive. It seems hard to believe.
Romantic love affects us on a more personal level. If you are sexually attracted to a person you met at a party and are rejected, you don't tend to slip into a clinical depression or kill yourself. But if you are rejected by your boyfriend, girlfriend or spouse, it has a huge impact. As we have seen through brain scannings, one of the brain regions involved in romantic love lies right next to brain regions that help to orchestrate thirst and hunger. Romantic love is a drive, a survival mechanism; it evolved to enable our forebears to focus their mating effort on a particular individual and begin the mating process. The sex drive activates nearby primitive regions, but it doesn't seem to contribute to as many worldwide crimes of passion. Romantic love is an important part of us."
- this is very true. Love is a huge hook.