Good points by everyone.

Sonny was a promiscuous pig who basically used women as he wanted to. He was as reckless and careless in that department as he was with the rest of his life, telling strangers what he thought, flying off the handle, and the rest.

Fredo was overcompensating for his inadequacies by banging waitresses two at a time and marrying that horror show Deanna. He came to regret this in Havana when he told Mike he should have married someone like Kay.

Mike's true love was Apollonia, no doubt, and Kay was really as much as a beard as anything. She gave him the veneer of legitimicay, and produced heirs, which made Vito happy. He seemed to have no real use for women otherwise.

PLAW, one point....did they have singles bars when Mike got back from Sicily?