For example ("here begineth the lesson").
If you were to walk into the 'Haggard' (where the cows and the hay stacks live) of any small farm in rural Ireland. You would often find the 'Furze machine'. Furze or Gorse was often used to feed the cart horse and moo cows. The furze machine crushed the spikes and made a very nutritious and palatable meal for Dobbin and Daisy respectively. They were very useful pieces of machinery, but often very dangerous.
So if one was to go back many moons. A bachelor would often go to a dance to seek out a future wife. He would not just be interested in if she was the only child, or if she was pretty, what religion was she, or how many acres did her father own? Oh no. The bachelor was far more interested in something much more important than that:
"Did she have all of her fingers".
Yes I know. You see it was quite common for the 'Furze machine' to cut through the furze and to cut off a finger. If the milkmaid (poor girl) had lost her finger. The bachelor would not be interested at all. SHE would not be able to hand milk the cows in the morning!
Think on now lads. When you are down that disco until four in the morning spitting in some young lasses ear. Make sure to check that she's got all her fingers!