Just to put it into context, saying "oh, she's cute ... your type?" or similar, that would be ok to me.

To use a RL example I had of what not to say:

"See that woman over there?"

*me, confused because there are many women around*

"That's the sort of woman who walks in a room and all eyes are on her. She's just beautiful, and everyone wants to be with her. She looks like sex on legs, seeing her has made my whole day better."

Said by a short bald guy, who is married with 3 kids ... I eventually worked out he was talking about a woman who was in her early 20s and just having a friendly chat with work friends. She wasn't angling for attention in any way, and the guy I was having lunch with was just openly ogling her.

It varies person to person, in my experience. Some straight dudes are also uncomfortable with this "guy talk". And some bi and gay chicks will do it so much it makes me uncomfortable lol

I don't think so, you're just sharing something with someone you know has the same interests. I doubt you'd start catcalling together.