A question of social fear

I have never been answered for one thing since very long, Human individual can feel hungry and ask for food, can feel thirsty and ask for water to quench thirst, similarly all other drives to overcome the basic needs of body. Now question is that if one do not feel any hesitation and shame for any of these drives then why to feel shame for having "Sex", as it is also a drive same like huger, thirst and others??? If it is due to Social effects, ethics, religion, customs, and beliefs then why not other drives be treated as this one?

Question should not be taken in negative meaning, satisfying answers will be appreciated.


(Posted on my Facebook page on 10 April 2015)