Fly of jeans

If you say that to err is human, you mean that it is natural for human beings to make mistakes. To err is human, and nobody likes a perfect person. 

It is quite a straightforward phrase. No one can challenge it despite all the logic against this great factual reality. 

Indeed humans are prone to indulging in rather straight mistakes all the time. 

All the refined precautions are taken with all the careful alerts but errors are bound to take place. 

Even the wise people sometimes falter and later repent at their apparent blunders. It is a natural thing. Perhaps it is because of all these apparent causes we follow or apply extraordinary caution in compliance with the set rules.

What one important thing remains attached to our daily lives. Isn't it so? It is relatively very common and fast that one realises only after realising the fault a little later.

Not only minors do it but even majors are not free from making this sort of mistake in the busier life on the earthly planet.

Under normal or usual conditions, the fly of our pants or jeans is something we try to conceal and God forbid if it remains unfastened, undone, or untied.

Why are the buttons on trousers called flies? "Fly" does not refer to a button, specifically. It refers to the flap of material covering the opening or fastening of a garment.

The term was originally used in England to refer to the flap on a tent (which flaps or flies when the wind blows if not tied down.