It's notable that the opposite isn't true, men's libido doesn't diminish while they lift heavy objects, service a mortgage or repair their spouses car. Women continue to seek sexual tension, far more than the act itself. The typical evolution of romantic relationships is one of gradual decline of libido for the husband and precipitous decline for the wife after she's popped out the first born.

The cracks in Judeo-Christian edifice are appearing in the form of rejection of gender norms and marriage is becoming less popular. It wouldn't be a complete surprise that we are witnessing the dawn of the sex robot. When the technology exists there surely is also a market for babies in a can and a revolution in women's liberation not seen since the contraceptive pill.