SAN FRANCISCO (AP) — Too sexy for the drought? No such thing, according to San Francisco Bay Area water officials who are rolling out a new line of racy public awareness ads coaxing an already water-thrifty metropolis to give it up just a bit more. “Go full frontal” blares one ad featuring a photo of a front-loading washer — sleek, steel and up to half as water-guzzling as a top-loading machine.