It is often used in a playful or ironic way, sometimes implying:
* That something is being done for the benefit of the home, even if it might not be the most enjoyable or convenient. For example, a person might say "Kodin onneksi, I'm cleaning the kitchen!"
* That a certain action is necessary for the well-being of the home, even if it is unpleasant or inconvenient. For example, a person might say "Kodin onneksi, I have to do the dishes!"
* That something is being done for the good of the family, even if it is not necessarily what the person wants to do. For example, a person might say "Kodin onneksi, I'm going to a family gathering!"
Essentially, "Kodin onneksi" is a playful and endearing way to acknowledge that sometimes, we have to do things for the sake of our homes and families, even if it's not always fun.