So much is subconscious. In graduate school I knew a few male professors who were introverted but who had tremendous presence. They would come into a classroom and deliver the lecture, then leave. But the way they handled themselves...yes...there would be a palpable solid presence. One professor used to sit in his car and wait for the time when class would begin. I am sorry to say this because it is so silly but all the girls would watch him through the cafeteria window. They would wonder "Why is he sitting there?" They would note he wasn't on his cell phone, or distracted. They would say, "Oh, he is thinking about the lecture and going over it in his head." This professor was a constant source of female attention, yet he did absolutely nothing overt. I became friendly with him because I was an older student and nearer to his age. I found him to be a wonderfully kind man. Simply superb. A wonderful human being. But very much a social introvert. (Married three times!)