He wants to ease your stress after you came back from a mission. He knew you liked admiring him, staring at his features. So he did you a favor. He sat in a chair, and showed himself to you. Yet, he didn't take off his sniper hood. He had you at such a vulnerable, and irresistible state. He enjoyed seeing you like this. He saw how you slowly calmed down, relaxing as staring did enough for you.