Well, we can go back and forth with numbers and meanings of "uncommon."
Men and women were BUILT to be sexually attracted to each other. They were built to compliment each other in every way. The attraction of male/female has been extolled through time, culture and country, even thought to be YIN and YANG.
Yin and yang can be thought of as complementary (instead of opposing) forces interacting to form a dynamic system in which the whole is greater than the parts. Everything has both yin and yang aspects, (for instance shadow cannot exist without light). Either of the two major aspects may manifest more strongly in a particular object, depending on the criterion of the observation.
And then there IS procreation. No children in a Josephite marriage.
I studied T'ai Chi and Ch'i Kung for years but thanks for the lecture.
No children in a Josephite marriage.
Actually, we're plenty busy raising two grandchildren (derived from her first marriage).