This book is an absolute treat.
"When you're in love, your brain secretes endorphins into your blood. Organic morphine leaks out of a gland in your skull, feels like a low-grade opium rush. Some people confuse the two, the head rush and the love. You think you're in love with a person, but you're in love with a syringe. You're high and hooked, and soon comes the more, more, more: marriage, career, mortgage, children, school, it's harder and harder to feel that rush."