Often you'll have other choices to make. Sometimes your mate will, too. Like when she is picking up beer, and she can't decide what kind to get you. She thinks you'd like the Hemp Hop Rye, so she puts that in the cart.
Then she remembers that she also likes it, and decides to pick up the 5 Day IPA to make sure there is enough for the both of you.
Then she's not sure you like the IPA, so she picks up some Gold just to make sure she's covered.
Then she gets home to show you what she's done, and you realize that you both made the right choice.