I thought I was doing just fine, but Billy wasn't feeling it. I have probably had other models who struggled to get into an appropriate mood, but Billy was the first one to say so, and the first one to almost cut the shoot short as a result.
I convinced him to stay, and though he had planted a big seed of doubt in my head, I ended up loving the results, and he did too. It's very interesting to get feedback from the models. Some like facing the mirror, some don't. Some have trouble understanding what I'm after when I'm always asking them to look away from the camera. But so far, pretty much everyone has been happy with the results, and I'll just keep trying to learn from each experience.