"Brunettes cum first?" I can get behind that rule. In fact, my rule is
1. She ALWAYS cums first AND second if she enjoyed the first.
2. Make sure she feels like she is being valued and even worshiped as beautiful and precious.
3. I have NEVER met a woman who didn't give back as good or better than she got from me. Spend the whole time asking and listening to what makes her toes curl and her body quiver.
4. If you want a repeat of the sex, follow the above rules.