To Duanmu Huai, being a model wasn't a big deal. The only noteworthy thing was the reaction when he disrobed in front of the students; the female students' eyes sparkled and the male students alienated themselves... Well, it was understandable.
Duanmu Huai didn't have to do much throughout the session, he just posed and let his mind wander until the time was up. As for the students' renditions... well, he thought they should be the ones answering that question.
In general, it was a relaxed process. After the course, Duanmu Huai got along better with the students, and he explained his identity to them and handed out a pile of business cards - this was the main reason he came to Miskatonic University, after all, compared to other places, students and teachers of Miskatonic University were more prone to getting into trouble and thus more likely to commission assignments, weren't they?