After listening to "My brother has a wife"

When I listened to the song "My brother has a wife" before, I thought it was for the purpose of teasing or showing off, but after listening to this song, my previous views have changed. I can't say how thoroughly I understand this song, but I also have some opinions. Personally, I think this song is about a young man who has just left the society and is firm in heart in the face of various temptations. He remembered his promise to his wife at home and warned others not to be half-hearted. Maybe there are some writers' promises to their wives.