Dear Sridhar, don't get so confused. Shiva's reproductive organ has a lot do with spiritual aspects. The ancient's view of sex is quite different from what it is today. They believed sex liberated people to a state where people could have glimpse of GOD. Itz not obscene. Itz absolutely spiritual ONLY when u understand the concept. Believe me, hinduism is a set of principles that derive their existence from the laws of nature and a understanding of the soul