The joke you should have heard Jay tell:
A study found that the 1st thing men say they notice about a woman is her eyes.
His joke: 1st thing women notice is that men are a bunch of liars.
My joke: 1st thing women notice is a man's eyes looking down at their breasts
Maybe my mind is in the gutter way too often, but given the context of the set up, the logical punch line spun off the part about the eyes. Either one is funny and both poke fun at the same male behavior.