LONDON (Reuters) - UK advertising regulators signaled a weariness of the double entendre used by French Connection to sell its FCUK brand and warned the clothing chain again, this time over a promotion for its line of fragrances. In an ad placed for French Connection by Zirh International in the Boots pharmacy chain's magazine, a picture of a young couple sitting on a bed in their underwear included fold-out samples of perfume with the phrases "open here to try fcuk her" and "open here to try fcuk him." Though it received just two complaints, the UK's self-regulatory Advertising Standards Authority...