Help me with my schoolwork (involving ethical dilemma)?

I have an assignment in which I have to explain my observations of a behavior (overeating, smoking, passive aggression, etc.) and tie in psychological research. I can handle that part, but I also have to point out the ethical dilemmas that could arise from my observations, and this is where I’m having trouble.

From what I understand, an ethical dilemma is when a person has to decide whether to 1) do what is morally/ethically right and suffer the consequences, or 2) do what is morally/ethically wrong for a favorable outcome (feel free to correct me if I’m wrong). I don’t see how that applies here. Don’t ethical dilemmas involve more than one person? How can something like overeating create an ethical dilemma?

Please help. I’m frustrated =( Thanks