What is a polite way to ask the guy I'm dating to wear less cologne?

The guy I’m dating is excellent in so many ways, but I find his cologne to be less than enjoyable. When I’m around him I don’t tend to notice it much, but it wears off on me.

However, I would never want to offend him. If he told me that he wished I wore less make up, or changed my hair, I would be unhappy. Should I ignore it?