Don't damage your health for the sake of appearing polite to your host/hostess/family/fellow guests, etc! - The Christmas season can be a difficult time for people who are trying to avoid foodstuffs and drinks that they know are harmful to them. - If your host/ess is pressing you to have a second helping when you've really had enough, or tempting you to a salty food or sugary confection you would rather forego, be resolute! - Just politely say, 'No thank you'. - You do not have to give a reason (which could invite dissension). - Be polite, clear and firm. - If you waver and allow yourself to be persuaded against your better judgment, you may find your tempter conclude that you did want it after all and that you are someone who usually needs to be asked more than once. Similarly if you would prefer not to have a cigarette or an alcoholic drink. - Resist the "Go on! - It's Christmas! - It won't harm you to have a little drink/treat once in a while!" - That may - or more likely may not - be true, but you are an autonomous adult and should be allowed to make your own decisions about whether to partake or not. It is not obligatory to over-indulge when you'd rather not.