Blue Cheese Dressing

Posted by james on March 1, 2006

How come if I leave blue cheese dressing out on the counter for a night, I'm pretty sure it's not good to eat the next day... and if I left it in a warm/wet place for 24 hours or so I'm pretty sure it would kill me to eat it...

But why is it ok when it's in my body digesting? Does it go bad in my stomach but since it's already there it doesn't affect me?