SEND HC + A WORD AND I’LL WRITE A HEADCANON.
Given that he was raised in a lower-class household and never received much of a formal education, the only form of dancing that he knows is the result of being in a drunken stupor while in a tavern or wandering the streets of Tortuga. It was never something he got much joy out of, even in his youth, mainly because he never understood ( and still doesn’t ) why someone would waste their energy on twirling and jumping around when they could save it for other things. In addition to all of this, his peg leg would also make it somewhat difficult.
As I mentioned previously, he was born into poverty, to two farmers in England’s West Country. Animals had always been a constant in his young life, whether they were livestock or dogs and cats that his parents kept to assist them. However, Barbossa abandoned his life and thus his direct connection with animals at the tender age of thirteen when he ran away to sea. During his time earning an honest wage, he could see that the exotic pet trade was a profitable one, and with good reason. Never before had he seen animals so alien ( as he was accustomed to horses, pigs, and goats ), and while he imagined that perhaps one day, he could be a trader, he also wouldn’t mind owning a parrot or other colorful creature himself.
His plan to involve himself in the animal trade never came to fruition, for when his desire for power, money, and luxurious quarters to call his own outweighed his honor, he turned to piracy. After a while managed to acquire his own vessel, the Cobra, and in celebration of his success, one of the first purchases he made as a captain was a black-billed amazon*, which he ( rather uncreatively ) named Polly. He didn’t own Polly for long, though, for reasons stated in The Price of Freedom:
“I did have a parrot named Polly once. A fine bird he was, but he messed up the shoulder of me jacket.”
Polly the parrot was soon replaced with Polly the monkey, and Barbossa found that he greatly favored monkeys over birds, despite their occasionally difficult behavior. Polly became not only a source of entertainment for him while on long voyages, but she also gave him something to be affectionate towards while he spent his days barking orders at his crew and intimidating those on the ships that he boarded. Essentially, she was like his child, just as any pet is to an owner that cares about them deeply.
His ownership of Polly ended when the Cobra was sunk by the Koldunya; it’s suggested that she drowned among the wreckage, judging by how Barbossa recounts the event in The Price of Freedom, though it’s never specifically stated:
“I was in the water, no boat within reach. Me poor Polly had been holdin’ on to me shoulder. She was wearin’ her little blue dress, but suddenly she wasn’t there and I couldn’t see her. I swam under, gropin’ through the water and the wreckage, tryin’ to find her, but she was gone.”
It wasn’t until much later, after he had crewed up with Jack Sparrow aboard the Black Pearl and had mutinied against him that he acquired Jack the Monkey who was named out of mockery for their ex-captain; my personal headcanon for how he acquired Jack is detailed here. Originally, he had promised himself that he wouldn’t grow as attached to another pet as he had to the late Polly ever again, but he soon became just as affectionate ( if not more so ) to his new companion as he had been towards Polly. The lingering fear that Jack would meet the same fate that Polly had was always present, but after weathering a decade of immortality together and surviving the events of AWE, the worry diminished greatly. He also wouldn’t trade the ability to have a second pair of eyes and means of reaching places he often can’t for anything.