Proof of Donut

I heard this bit on the radio today:

The other day I bought a donut and they gave me a receipt. I don't need a receipt for a donut! I give you money, you give me a donut. End of transaction. No need to get ink and paper involved.

I can't imagine a scenario where I would need to prove that I bought a donut. A skeptical friend perhaps? "Dude, don't even act like I didn't buy a donut. I have the documentation right here!"

I just have this to add: You know you're a lawyer when you hear this bit and start thinking "Well, what if you are accused of murder and you need an alibi for the exact time you bought the donut? Or what if the donut makes you sick and you decide to sue?"

So, yes, I am in the right profession. That's all.