You can't reliably read body language to know what someone wants sexually. Assuming you know and acting on it without asking leads to unwanted advances. Ask explicitly instead of guessing.
Let's imagine we have 2 people on a date. It's going great. One of them, like many of you in this room today when you walked in, might be thinking, hey, I can read body language. It might not be perfect, but I can read it, and I can tell this person wants me to make a move. So they make a sexual advance. This person does not want it. Could we quickly have a disaster situation on our hands? Yes or no? Yes. Do these scenes happen a little bit or a lot? A lot. They do happen a lot, and here's why. Body language relies on 2 things. Assumption and arrogance. Let me explain. The assumption that I know exactly what you want me to do to you. The arrogance that I believe I have the right to do it without confirmation.
