There were two Jewish women (Ruth and Golda) walking along the street. Ruth says to Golda, "My son, Irving, is finally getting married. He tells me he is engaged to a wonderful girl, but... he thinks she may have a disease called herpes. Golda says to Ruth, "Do you have any idea what this herpes is, and can he catch it?" Ruth answers, "No, but I am just so thrilled to hear about Irving's engagement. It's past time he's settled. As far as the herpes goes...who knows?"
"Well," Golda says, "I have a very fine medical dictionary at home -- I'll look it up and call you." So, Golda goes home, looks it up, and calls Ruth... "Ruth, keinahurra (thank goodness!), I found it. Not to worry! It says herpes is a disease of the gentiles!"