Food in the work place

It seems like everytime I turn around someone else in the office is having a birthday. What does that mean... birthday cake. From birthday cake to candy bowls sitting on just about everyone's desk. This has to be why so many people are over weight, you just can't escape it. Oh, and don't even say you don't want any cake because then it's as if you don't want to say happy birthday to that person. I really just need to be able to work from home. I see that as the only solution.