Some years ago, I was on a plane seated next to the most attractive woman I've ever seen; she was reading a book entitled "Encyclopedia of Sexual Facts." After awhile, she mentioned "Well, I didn't know that the American Indian is the most physically endowed group, sexually, in the US." I didn't quite know what to say, so I kept my mouth shut.
After another quiet spell, she again said "Well, I didn't know that the Amish have the greatest sexual stamina in the US." Again, I was speechless.
Finally, as the plane landed, she closed her book and said "By the way, my name's 'Susan,' what's yours???" Finally, I blurted out "Tonto Yoder!"