Aidan Gillen and Martin Cummins in Dice - Glenn and Patrick 02

From UK / Canada production series "Dice". These are my two fave scenes where the psychologist, Glenn Taylor (Aidan Gillen), flirted with Detective Patrick Styvesant (Martin Cummins) and seduced him. I'm really curious how Glenn sensed Patrick's sexual orientation, I mean, they only met each other twice and Glenn started to flirt with Patrick at the third time!?