I think it would be to keep things in there.
Most suits come with pockets sealed to prevent them from catching or bunching during transport and sale.
Some dress shirts commonly have holes, which are pockets. The pockets are just a apart of the shirt for stylish accent.
Hot Pockets were invented by Paul and David Merage in the 1970s. They founded the company Chef America Inc. and began producing the product Hot Pockets in 1983. Hot pockets are based on and similar to the pizza type food called Calzone.
Forms or variations of pockets in clothing have been around for centuries. Therefore, it is not known for sure when they were invented but they first surfaced in the early 1200's.
She invented underwear with pockets.
Collars were invented in 1827.
When we have pockets.....
Pen/Pencil Money Handkerchief Glasses Cigarettes
Many women don't wear shirts with pocket but they are usually on the left
Cavemen.
Pockets are more prominently on the left side of a shirt because most people are right handed. This allows a right handed person to access the pocket easier.