So you don't know if they're male,female or bi-sexual.
In my brief interaction with the prof in writers corner I would say he's a man.
But us blokes are not well known for their intuitation.
You never know. This person could come out with "I'm a tomboy".
Bi-sexual's are not the only ones who might be ambiguous.
Very true, the Q in LBGQT encompasses a wide range of people, some very different than others, the definitions we traditionally have are not adequate, "straight" "gay" "bisexual" are terms which are being rejected by some within the Millennial generation. They are doing something that should have been done long ago but was stopped short by the Reagan and Bush years. Those are labels, labels people use to lock others in, to hurt others, while for others they are just casual words and not controversial at all, but the two are related.
Mostly every group on that list will have members that in public look and act very much like "straight" people.
Tomboys could very well self-identify with Q.