It is so cool when a student from four years back remembers you, remembers your name, and tells his friend "This is Tee gee eff eye.. my Biology T.A. and thanks to her, I changed from being a business major to a biology major".
It is so not cool if you've bumped into him at a bar, and just moments earlier, you were telling your friend that you thought he was cute and were wondering why he looked familiar.
It is even worse when he then proceeds to introduce his friend to you ...as his "boyfriend". And sees you visibly shocked and says "surprised?? hahahahha".
Bleddy gaydar. Two drinks and it stops functioning!!!