There is to my mind no doubt that the concept of beautiful had its roots in sexual excitation and that its original meaning was sexually stimulating.
Sigmund FreudOur possibilities of happiness are already restricted by our constitution. Unhappiness is much less difficult to experience. We are threatened with suffering from three directions: from our own body, which is doomed to decay and dissolution and which cannot even do without pain and anxiety as warning signals; from the external world, which may rage against us with overwhelming and merciless forces of destruction; and finally from our relations to other men. The suffering which comes from this last source is perhaps more painful to us than any other.
Sigmund Freud