How many bananas do you buy at a time to assure they get eaten and not go bad before your next shopping trip?

There's no such thing as a bad banana!  They just move closer to their destiny as banana bread or banana tapioca pudding (simmer the mashed banana with the milk to flavour it, then strain or not according to preference, turn pieces of fresh orange into the finished pudding).  Since I've discovered yeasted banana bread as sandwich bread I go hunting for the sad looking bananas.

Usually 5 or 6 small green ones.

3.                    

It's taken me a long time to learn, but now I buy only 2 or 3.

I use them as a dildo do about five every time

I buy the whole bunch at Costco, about 8 or 9 hands and keep them in the freezer.

I buy about 7.  If they go too bad I make banana bread.

We usually by 5 or 6. 1 or 2 usually starts getting bad, but I'm the one who usually still eats it before it goes completely bad. Sometimes, dad would chop it up in his cereal or mom would put it in a blender for a smoothie.

Four or five at a time. No more.