"Doctor's office" joke

Three men went to the doctor's office... The first man runs into his office and yells:

"Doctor! Doctor! Help me! I've got a green ring around my dick!" and the doctor replies:

"Oh well you'll die in 2 weeks"

The second man runs into his office yelling:

"Doctor! Doctor! Help me! I've got a yellow ring around my dick!" and the doctor replies:

"Oh well you'll die in 2 weeks"

The third man runs into the room yelling:

"Doctor! Doctor! Help me! I've got a red ring around my dick!" and the doctor replies:

"Don't worry---it's just lipstick"