About Hindu Religion concept: An ancient time, Nepal actually named Mahabharat while King Maha Bharat ruled in ancient time. Shiva or Mahadev was a chief of native tribal of Nepal. Shiva has super power to control Nature, Life, Time and magical war skill. so south indian people pray him as a super god. They created a concept of human life origination from shiva linga and prabati yoni. When Hindu religion created by south indian.... they started to pray in a idol of shiva linga. It is nothing about sex but it is related with symbol human origination.