I've had that happen to me. It's hard to know why people ask. I've had women ask me that trying to make conversation, and I'm a woman. The one co-worker who asked me if I was married or had kids, he was married but he'd stare at me all the time at work. I think what guys do when they ask girls that is try to see if there's a possibility for a date or sex in the future, or they get that information because people at work are wondering about it and they pass it on. I kind of feel like with that one male co-worker who asked me, if I had been the flirty, friendly and/or trashy type, he probably would have tried to have an affair with me...but I wasn't like that at all (I was more like an "intimidating" b!otch type), plus I like women anyways.