This might help:
This leads me to believe that sexuality was indeed tied to spiritualism and religion.
Well, my speech has been influenced by an interesting research, made by an Italian anthropologist, who explained why Hindu people are so prolific. In fact, nobody can deny that India and Bangladesh are among the most overpopulated countries in the world. The reason is that Hinduism sees genital pleasure as sacred, so people have sex just to celebrate the beauty of nature.
Sexual activity in India is unbelievably intense because people have sex not because they are in love, but just to obey a general Hindu law. That's the reason why there are arranged marriages too. Marriages without love between strangers.
The anthropologist explained that countries like Usa and Uk are quite prolific, because Nordic people are beautiful, so they easily are attracted to each other. That's why sexual activity (and birth rate) is quite high. Countries like Italy and Greece have a very low birth rate because people are tendentiously ugly, so it is very difficult that two people are attracted to each other.
Obviously what an anthropologist says is not the Gospel truth, but it is true that in Italy people don't usually mate because of their ugliness.