In my experience, anything that goes in the application should be solely medicine related. Admissions people/interviewers often only take a cursory look at the application and when there are non-medical things like that, it can be a red flag. It may make perfect sense to you as to why you would include it (and you could probably explain it in an interview) but an adcom who's only taking a brief look at your app may decide you don't know what you want to do. Thus you may not make it to the interview to explain it.