Brain, meet stomach....Stomach, meet brain

I am not sure how my brain and stomach just cannot hook up!   It seems as though they are on two different bodies.  I had to run out at lunch today to the library and a co-worker asked if I would stop and pick something up for lunch for her.  I called her as I was leaving the library and told her I was passing by 2 or 3 different fast food places.  Don't panic...I didn't get anything at Arby's, oh how I wanted too, but I didn't.  Instead I went into the pig (that would be the Piggly Wiggly for ya'll not from the south) to get a salad.  I was really wanting chicken salad.  As I was standing in front of the salad selections picking out some chicken salad a nice sweet old lady told me that the pea salad was very good.  So now I am holding a small container of chicken salad and pea salad. As I was walking away her husband (at least I assume it was, very sweet as well) said oh no, you need to try the ham salad.  So instead of putting something back or just saying no, Fatty McButterpants Kim decided to get them all.  Now I have no intentions of eating it all, but I thought I would try at least a little bit of each and take rest home.  Now that I am back in the office and had about 4 bites of the chicken salad and 1 bite of the pea salad, I am not hungry.  Why, oh why can't I just say no to food?  I mean do I think that I will never eat again?  I have put the rest of my salads in the fridge here at work and will eat on them for days at home, but why did I need to buy them all?  Get with it brain and stomach!