Why does Caesar ask Antony to touch calphurnia?

Caesar asks Antony to touch Calpurnia during the Lupercal festival as a superstitious gesture, believing that it will help her become fertile. Calpurnia had been unable to conceive, and Caesar wants to ensure that she receives the blessing of fertility. This act reflects the customs and beliefs of the time regarding fertility and the importance of lineage in Roman society. It also highlights Caesar's affection for Calpurnia and his desire for her to bear children.