How do I know?

How do I know I married the right girl for me?
Easy. I just need to look at her list of birthday gift book requests:

• The Triple Helix : Gene, Organism, and Environment
• How the Mind Works
• Philosophy in the Flesh : The Embodied Mind and Its Challenge to Western Thought
• Interpretation of Cultures
• The Anthropology of Food and Body; Gender, Meaning and Power
• Challenging Behavior in Young Children: Understanding, Preventing, and Responding Effectively
• Space in Language and Cognition : Explorations in Cognitive Diversity
• More Than Human : Embracing the Promise of Biological Enhancement
• Language in Mind: Advances in the Study of Language and Thought
• Art and Physics: Parallel Visions in Space, Time, and Light
• Back-of-the-Envelope Physics
• The Seven Daughters of Eve: The Science That Reveals Our Genetic Ancestry
• Living with the Genie : Essays on Technology and the Quest for Human Mastery

and also:

• High Tech Harvest: Understanding Genetically Modified Food Plants
• American Agriculture in the Twentieth Century : How It Flourished and What It Cost
• Mendel in the Kitchen: A Scientist's View of Genetically Modified Foods
• Nutritional Epidemiology
• Natural Eating: Nutritional Anthropology - Eating in Harmony with our Genetic Progamming
• Dinner at the New Gene Cafe : How Genetic Engineering Is Changing What We Eat, How We Live, and the Global Politics of Food
• Eating in the Dark: America's Experiment with Genetically Engineered Food

and of course:

• Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation

Note how all but four have colons in the titles.