Which is better for a man's health: to be uncircumcised or circumcised?

Hard to answer. Some studies have shown that 50% of uncircumcised men will seek medical attention secondary to problem with their foreskin. Recent studies have shown a decreased risk of sexual transmitted disease in circumcised men, albeit a small decrease and is more important to a population then the individual. Critics of routine circumcision claim this causes reduced sensation during sexual intercourse.