Accurately speaking, this belongs to the principle of ladies' priority in adult communication, and it should be that ladies reach out first. It also includes: when greeting, women first, then men; The lady walks in front (the road conditions are clear and safe); When walking side by side, the lady is on the inside (with the wall); Please take a seat first; Help the lady carry heavy objects; Help the lady take off her coat while sitting. I hope I can help you.