Jack: Have you ever had sex with a prostitute?
Sawyer: What the hell has that got to do with anything?
Jack: Is that a yes?
Sawyer (reluctant): Yes
Jack: And have you ever contracted a sexually transmitted disease? (No reply) I'll take that as another yes. When was the last outbreak?
Sawyer: Go to hell, Doc.
Kate: I know he deserved it, but -
Jack: He needs glasses.