Why do male colleagues always like to play tricks on me, tease me and bother me? Do you boys tease your female colleagues like this? He seems to like playing with me very much. Why?

He has a crush on you. If a boy doesn't like a woman, unless he is naturally talkative, he will never talk much, but only ask and answer politely. However, if he secretly loves you, he will take the initiative, because he feels particularly happy to talk to you, especially when he sees you, and your face is red with anger because of what he said. He will feel particularly cute, want to see more, and will always tell jokes to amuse you.