My job has me sitting at a desk for eight hours a day in front of a computer, yet I still go to the gym all the time and regularly get asked what my workout is by random people. Wanting to bulk up (or just generally stay in good shape) is not necessary for your job. The man is not just a sociopath, but likely a narcissist (often associated with being a sociopath) as well. Is it any wonder that such a person would want to “bulk up” without needing to for their job?