They were acrobats, which probably helped. I'm surprised this article didn't mention that tidbit. > Only one couple was able to have sex without Viagra. The au

They were acrobats, which probably helped. I'm surprised this article didn't mention that tidbit. > Only one couple was able to have sex without Viagra. The authors wrote: "The reason might be that they were the only participants in the real sense: involved in the research right from the beginning because of their scientific curiosity, knowledge of the body, and artistic commitment. > "And as amateur street acrobats they are trained and used to performing under stress."