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Diane Keaton, 'Something's Gotta Give'
What is it with Jack Nicholson and older ladies and their bare bosoms? He gets a full frontal eyeful of Diane Keaton's character while he's "looking for the kitchen." So that's what the kids are calling it these days. (As a side note, age has been very, very good to Keaton.)
Bonus leer-fodder for those who enjoy the male torso: More naked Nicholson.