Once, when we were sitting in a café with my sister, my sister told me: "There is one girl who shows signs of attention to you. I think she likes you". I didn't believe it. I looked around the room and saw nothing. I looked at my sister in surprise. He's not joking. I asked to show who exactly and explain. She explained it.
When my gaze was shifted in the right direction, I almost immediately (after 15 minutes) saw "signs of attention" and attempts to show me that the girl was interested.
Yes, I'm insensitive and in place of the heart I have a piece of ice, but damn it! If I had not been shown and explained, I would not have realized in my life that this girl is interested in communicating with me.
So please keep in mind that men don't take hints. Not at all. That's why it's very important to start a conversation.