Have you ever wondered whether your husband-to-be is smarter than the average man? Research has shown that these are eight signs that a person has above average intelligence. Best put hubby to the test before you make your vows! 1. He’s the Oldest It’s been shown that the oldest sibling in a family is usually the smartest, not because of anything to do with genetics, but because of psychology and family dynamics. 2. He Doesn’t Smoke A study in Israel that looked at the habits of 20,000 young men