Spoiled milk

I don't get the hubster sometimes. Yesterday morning, I made my morning coffee and brought it into work. During the summer, I makes iced coffee. I use the small setting on my keurig and add milk and ice. Well it tasted horribly. The milk must have gone bad. The sell by or used by date was a few days past. I figured it was ok. I like to live on the edge.
I made a passing comment to the husband about how he left his uneaten cereal in the office Sunday morning. He says oh the milk was bad! Wtf?!?!! And you didn't throw it away? You let me use it in my coffee?!??

Thanks a lot!!!