Well, Fanucci had heard a disco version of La Donna e Mobile and he was going to dance to it at the San Rocco party later that night.

In all probability it was vanity. And Vito wanted to mislead Fanucci into thinking that everything was going to go just as it had in the past - deception, pure and simple.

"Generosity. That was my first mistake."
"Experience must be our only guide; reason may mislead us."
"Instagram is Twitter for people who can't read."