Times Square is a marvel of print advertising, and the limits of good taste are regularly tested there on giant billboards. Here's the latest: a giant photographic banner featuring an assortment of bottoms decorated with smiley faces. The ad, for a new product called the Toto Washlet, went up over the weekend and has already delighted tourists and wandering photo magazine editors. But you haven't seen anything until you've gone to the Toto Washlet website, which unnervingly seems to put real faces together with the smiling rear-ends. What's your vote: Does this ad belong in public?