What is the lowest reasonable body fat percentage for a male without starving himself?

What is the lowest reasonable body fat percentage for a healthy, activemale without starving himself (Preferably athletes and models)?

Public Comments

1. 5-8%
2. 15% is average for a fit male. 12%-18% is the fitness range. Below that it's for athletes and bodybuilders, above that is for inactive folks.
3. One bodybuilder got down to 5% bodyfat.