The Amish and the Mennonites have their issues too and are frankly much more cut off from the "world" than JWs are. They definitely long to experience different vagina and penis deep into a boring marriage. No pun intended. "Love and Commitment and Vows" are no different in any arena on earth and shouldn't be confused with sex, lust and infidelity. Watching the series "Growing Up Amish" I have no doubt they are very resourceful when it comes to testing the waters outside of marriage. We just can't hear it or see it because not a large enough community that cares enough inside or out has exposed it.
Even in the Garden of Eden we would tire of picking the same fruit even what is forbidden. Oh wait....
This is not an endorsement for The Church of Jesus Christ of Latter-day Saints either.