What a thoughtful son.

We've all been there before: you see a mystery cake in the fridge, stick a fork in it, and go to town, only to discover that it was purchased for your dad's birthday and now you're the jerk. 

No? You've never done that? Well, redditor Art_Van_Delay has, and I don't blame him.

There was no way to know this was a birthday cake for his dad and not just a fridge cake for snacking. It's not shaped like a birthday cake, it doesn't say "Happy birthday" on it, and it's pretty hard to remember just when dad's birthday is anyway. 

Sources: redditor Art_Van_Delay