Twinkies Do Not Last Forever

I am sure some have heard that twinkies have an indefinite shelf life. This idea was used in the show, now off the air, Family Guy. The episode dealt with a Mad Max genre, and the main characters,in an attempt to fing food, went to the Twinkie factory because Twinkies last forever.
The truth is, as anyone using basic common sense could figure out, that they do not last forever. They last for about 25 days, which is considered a long shelf life for any baked goods. The reason they last that long, is that they are created with no dairy products.