A woman went to the doctor’s office and said, "Doctor, I've got a bit of a problem. But, I'll have to take my clothes off to show you." 

The doctor told her to go behind the screen and disrobe.

She did and the doctor went around seeing her when she was ready.

"Well, what is it?" he asked.

"It's a bit embarrassing," she replied. "These two green circles have appeared on the inside of my thighs."

The doctor examined her and finally admitted he had no idea what the cause was.

Suddenly, the doctor asks, "Your boyfriend wears earrings?"

"Why, yes, doctor, he does."

"Tell him they're not real gold."