At one campus where I was lecturing, I asked a friend, "How many of my colleagues know I'm gay?" He answered, "All of them." I wasn't surprised. But, just the same, it was kind of spooky, because not one of them had ever given me the faintest sign that he or she knew. If I had spoken about it myself, most of them would have felt it was in bad taste.
As quoted in "Christopher Isherwood Interview" with Winston Leyland (1973), from Conversations with Christopher Isherwood, ed. James J. Berg and Chris Freeman (2001), p. 108