Consider the following scenario: an acquaintance I personally do not particularly enjoy talking to is learning French and asks me for a favour, namely to chat with them an hour per week in French, my mother tongue. Would it be morally good to do them the favour, even if it would just be out of duty? Or another scenario: my mum wants me to visit her for Christmas, but I wish not to, just as much as she wants me to go. Should I go out of duty?
According to Kant, good actions must be motivated by a sense of duty, as opposed to inclination. But shouldn't it be just the other way round, at least if the action is about doing another person a favour? It almost seems immoral to do somebody a favour only because of duty.