Most people dont get an erection without sexual stimulation. However if I smell money, I might have an erection. Think about nature and the rising of humanity. The big deal about humans is that they stood up from the ground of the earth and they erected their spine in order to view the world from a higher place. Plants erect and face the sun in order to grow. Erection is like a turning towards god and all beings on this earth are doing it. Having lost the believe that erection only have to do with sexual desire, you keep digging and find out that sexuality is all over nature and that only humans feel ashamed of it. Like sexuality is life, is love, is god. When you feel the startup of an erection everytime you feel happy you might be in a good place. What do philosophers do? They penetrate the world by applying their exercised muscle, their power of reasoning. It is everywhere. What is one of the highest aspiration of a man? That the erection is not only focussed on his penis but that the same principle travels up the spine and reaches his mind and that his entire body becomes an expression of love and sexuality - because this is something we as man mostly believe is in the body of a female.