Natty British designer Paul Smith outlines his do's and don'ts for the 21st-century gentlemen in a cagey Details interview. Cologne lovers, beware:
- T-shirts seem easy, but they're a big no-no; go with a collar.
- A good, bland haircut is better than a failed stylish one.
- Women first! Don't ignore them in favor of a pal at dinner.
- Dress for the occasion, but chuck the bow tie if no one else is wearing.