Seriously, how do you dare buy green bananas? And how do you know how many to buy?

good one.
We in this house struggle with those two questions nearly every week!

Also seriously, my wife and I will discuss some trivial matter or purchase for weeks and vacillate over the decision then make some business decision that involves many thousands of times the money in a tiny fraction of the time. Boggles my mind sometimes what we spend our time worrying about.
Sometimes you just gotta do it and see how it turns out, without knowing ahead of time what the results will be.