(Reuters) - KFC on Tuesday apologised for an advertisement in Australia that shows two boys ogling a woman's breasts, after calls from a local campaign group to boycott the fast-food giant over the ad it called "sexist".The 15-second ad, which has been running on television for the past three weeks and is also posted on KFC Australia's YouTube channel, shows a woman dressed in a short playsuit check her bottom and adjust her breasts as she looks at her reflection in the window of a parked..