Many years ago (almost 20, I think), I was working as a contractor on a remote contract in a foreign country with one other person from my company, who also happened to be a woman. Since we were the only Americans there, and were staying at the same hotel, we naturally ended up having lunch and dinner together, and talked quite a bit. She was married, and I knew that. She commented once that she was spending more time with me than she normally spent with her husband and I laughed and said, "yep, next thing you know I'll be at your house for thanksgiving dinner this year". She laughed, I didn't think much of it. Well, quite a while later, we had sort of a "falling out": she had sounds turned on on her computer (remember when you could configure windows to play a sound every time you deleted a file or got an e-mail?) I asked her to please mute those sounds because it was really distracting. She refused, and I asked to have my desk moved so I wasn't right next to her, which irritated her, since she relied on me for quite a bit of technical assistance and now she had to walk across the floor to talk to me. We argued about this for a while, but then the contract ended and we were back in the states. Next thing I know, I get a call from my boss that she's filed a formal sexual harassment claim against me, based on my comment that I was "going to show up at her house for thanksgiving dinner". As you can probably imagine, I've been very cautious about my interactions with female coworkers ever since.