It sounds like 12-year-old boy's fantasy (or any other man's for that matter), but the giant boob floating on San Francisco's skyline is real. Early in the morning and in the late afternoon, depending on the positioning of the sun, the unique design of the St. Mary Cathedral casts a shadow on itself of a large, supple breast -- the type that only God could have a hand in creating. Click here to see the storied 2 o'clock t*t.