Gee, here’s a surprise: Men are more apt than women to flirt. According to a survey by Randstad USA, 41 percent of working men concede that they have flirted with a co-worker, compared with 32 percent of women. Men are three times as likely to nurture a secret crush on a fellow worker (12 percent versus 4 percent). Women also are judged more likely than men to form lasting relationships at work. The “flirtiest co-workers” live in Western U.S. states. Indeed, it seems workers have been getting more promiscuous on the job. Vault Inc. found that nearly 28 percent of workers had sexual escapades at work in 2006, including trysts in conference rooms, elevators and bathrooms.