With anant chaturdashi yesterday ganapati took away all difficulties which may strike us from countless directions and forms...with shraadh entering today on poornima its time to thank the departed ancestors for their legacy.
The Shrishti was created by Lord Brahma and lot of importance has been given to sustaining. Therefore, the emphasis on reproduction and need to carry forward the lineage. The concept of Pitra dosh in Vedic astrology too has its roots in the need to have progeny to do your last rites. We owe this to our ancestors and is called Pitri Rin or ancestral debt. These rights help you in your after life and lives after. There is a story which explains that since Yamraj, the Dharmaraj himself never married, had progeny, he could never leave Yamlok.