AllBodySurgery.com - How do you politely ask someone if they've had a nose job?

How do you politely ask someone if they've had a nose job?

I know a guy who has a perfectly straight thin nose. It looks too perfect. How do I politely ask him if he's had a nose job?

There is no polite way to ask this.
I wouldn't. Why would you care?
You don't. It's like not seeing someone for years who has put on some weight in their stomach and asking when the baby is due. There is no "polite" way to pry into someone elses business.