For most companies, a corporate ad that spreads virally on YouTube is nothing short of a dream come true. Not so for JCPenney, which is protesting a racy and unauthorized ad that took the video-sharing site by storm — until YouTube removed it. The purported ad, titled “Speed Dressing,” shows two teenagers timing themselves at home as they race to put on their clothes. Next, they’re shown heading down to the girl’s basement to “watch TV” while her mother sits upstairs.