A private decision deserves less explanation than a promise that affects someone else.

Explanation follows obligation. A decision that touches only you, about your body, your money, your faith or how you spend a Saturday, carries no debt of justification however curious people are. A promise that others have arranged their lives around is different, and there you owe an account. Confusing the two leads to defending your own choices while staying vague about the ones that affect other people.

Notice which of your recent decisions actually landed on somebody else. Give those a full explanation, and give the rest a short, friendly sentence and nothing more.