One night babysitting three kids will teach you what “responsible” actually means.

Responsibility stops being an idea the moment somebody else depends on you. Three kids for an evening means the hour does not pause for your mood, your phone or your plans, and you find out how much of being dependable is simply staying available. It is tiring in a way that optional things never are. Most people learn the word properly from an evening like that.

Take on something where another person is counting on you, even briefly. Mind the kids, walk the dog, run the warm-up. Watch how differently you behave when nobody can take over for you.