He's 100% straight, or to put me more precisely, no matter if he likes or does not like men he's really into women. We call him a vulture. This is a slung term in Greek to signify someone that really "hunts" women.
Physically, he's interesting. Nothing special but he gives me the vibe that "he's a man" and that is somewhat intriguing. He's not charming, he's rather an asshole in behavior.
We had a special training with him in charge. He called on the phone only the women if they had any questions about the seminar and then he was a bit mean with them by saying that they should have called him to make questions. We, the guys, were never called by anyone.
I feel almost violated by him. He was testing if we got the course skills and examined us. He gave us all a non passing grade and we had to re-do the exam where most of us passed (I did).
I've fallen to his trap. The girls don't like him, he's annoying. Actively, I don't like him either but when he would make some small moves to readjust his shirt of whatever my X rays are activated. Probably he could tell. From a point on he would call me too, as he did with the girls. The other guys he would not call.
When we talk, me and him, he has that bro/dude attitude. If I wasn't experienced with stupid people, I would have bought it. He catches me from the shoulder and talks to me (about related things with the practical course). I'm like "touch me a bit more and somebody will end up with a dick in his asshole real soon".
So this is not exactly a question rather a conclusion: this guy seems to be flatter that I've given him some hints that I like him and he doesn't mind I'm gay. He's equally asshole as he's with the girls. It's almost equality.