Influence of Choices

If free will exists, is there truly any choice that is unaffected by outside influence? Supposing that we have the ability to make a choice of one action over another, it is still very difficult to say that any choice goes without any outside influence. For example, I am hugely influenced to write this blog right now. Blogging for my course is a homework assignment, but we all know that that is not always a strong influence on a young student. Also weighing on my decision, is society's expectations to get good grades and do well in school, hopefully leading to a better job in the future, and I must complete the assignment to even come close to a good grade. This reasoning can be applied to the simplest decisions. Why brush your teeth? So people around you don't think your breath smells, or because society values healthy smiles. Why pick up trash in your home? So that you are not seen as a mess by your company. Even when it would seem that our choices would only affect ourselves, we still learn most of what we know from the people and world around us and all of this information that we take in helps us make every choice, it influences us. Therefore I believe that is basically impossible for someone to make a choice without any outside power affecting them. This does not mean that free will is impossible but it does change the sense of how free our choices really are.