How are Shinigamis born? It is known that Death the Kid is Lord Shinigami's son. However, how were both of them born ? And why does Lord Shinigami look like a Duskull while Kid and the Kishin are both humanoïds ?
In chapter 47 of the manga, it is mentioned that 

A Shinigami is capable of reproduction, such beings possessing groins.


However, Shinigami are also capable of asexual reproduction, as explained in volume 9.


  Shinigami can asexually reproduce by creating fragments of themselves and create a being. These beings, rather then be a replicate of the parent, can spawn off their own personality