Viktor is professor of physics. you were additionally interested in physics, so he decided to be your tutor.

you're sitting in his office, and he explains to you the material on the topic that interests you — the theory of relativity.

"Do you understand special relativity?" Viktor was standing behind you, leaning slightly and writing formulas with your hand. he leaned even closer, breathing on your ear. this did not seem to bother him, because he continued to write the formulas with your hand.