Question: 

After three years, since marriage, my friend has his first baby. Since the baby birth, pregnancy and delivery, he is feeling to have sexual disharmony and lack of sexual desire with his wife. Before that he had been a happy and pleasant boy and never has had faced the sexual problems and his sexual desire was normal. Why it is so? 

Answer: 

Some of the husband and wives at some stage of their lives may have to face the sexual malcontent which is called as "Inhibited sexual desire" or in other words lack of sexual desire or sexual desire disorder. The sexologists describe two major types of people. First one who doesn't have any interest  and sexual desire in woman after or before pregnancy and delivery, and secondly those who don't take interest and who don't have sexual desire in their wives only before and after pregnancy and delivery. These people use to leave their wives at their houses and try to get sexual satisfaction and fulfill their sexual desire from outside. Some of the other people use to do another strange act. When these people develops attraction from a woman out side their house they get attracted more towards their own wives, when she remains unable to provide the love with the demanded enthusiasm, these people consider them righteous in making the extra-marital relations. Whether your friend belongs to the same group? Many other people use to maintain the extra-marital relations and after that when they feel guilt, leave their partners helplessly. 

Another reason of sexual desire disorder or lack of sexual desire before and after pregnancy and delivery could be that they had been convinced to see their wives as a mother and doesn't get attraction towards her.