The do’s and don’ts of sex with co-workers

As the “sextortion” plot involving David Letterman continues to unfold, chit-chat about sex and the workplace — always a water-cooler favorite — is getting extra play. That’s good news for Nicole Williams, a career expert and author of the in-stores-next-week “Girl on Top: Your Guide to Turning Dating Rules into Career Success.” The media storm surrounding Letterman, she says, is bringing to the forefront an issue that’s as relevant and pervasive as ever.