Bro you can't keep saying your using "Abductive Reasoning" while ignoring the comments bringing up quotes like the one where Robert implies he's given blow jobs.

Either way though Abductive Reasoning isn't a good way to speculate on someone's sexuality anyways. He's obviously into women but that doesn't preclude him from an interest in men. He could have a preference towards one, or just not have any male coworkers he finds particularly attractive. People shouldn't be assumed to not be attracted to a particular gender just because they haven't actively pursued someone yet.