Why?

So, today at my local grocery store the woman at the deli counter reached her hand out and handed me a piece of the turkey she had just cut for me. I hadn't ask for it. It was 5:30 pm and I was going home to have dinner. As a matter of fact, I had brushed my teeth before leaving for the store, so obviously I didn't plan to eat turkey while there, but I took it and ate it anyway. Which begs me to ask the question "Why?" Why did she offer it to me (I assure you, I do not look hungry) in the first place? Secondly, why did I take it? And thirdly, why did I EAT it???