Mine won't tell me where he's going or if it's for work or fun, even if I specifically ask. It's been a point of conflict between us before, but he just says it's one of his boundaries. Well, he was willing to confirm that he wasn't going to the Dominican Republic two vacations ago (there had been reports on the news of Americans dying suddenly down there). A couple times after he's been back he's mentioned where he was. I don't know why, but I think I'd feel somewhat better knowing generally where he was going. Or if it was for work or, say, a family vacation. He allows emails when he's away, and I'd feel much less bad contacting him if he was at a conference than if he was on vacation with his wife and son. But then, maybe that's part of why he doesn't tell me, because he wouldn't want me to avoid contacting him for that reason...

ETA: Ex-T and ex-MC would tell me where they were going. Sometimes they volunteered it, other times it was if I asked. The one time I wish I hadn't been told was when ex-MC said he was taking his daughter on a trip to look at colleges. It triggered some jealousy related to paternal transference.