werecorpse
Adventurer
I run campaigns for my 13-y-o and his friends.
Every one of them will try to buy pets in any market we go to; it's like a traveling circus with dogs and cats, a monkey, a gecko, a gold fish...
They spend close to 1/2 of each encounter defending their animals; one started crying because while he could breath underwater, I reminded him after his fight with a shark that the ferret in his pouch could not.
That's brutal, not letting him know the ferret in his pouch was struggling & drowning during the fight. Couldn't the ferret escape the pouch & swim away during the fight?
I find that there are two types of pets people want. Those that have some mechanical benefit (ie a fightin dog, a spying rat) and those that are really there just for the fantasy of having a cool pet. The latter ones are largely character description & fluff, like a blue cloak or red hair, they have some plot immunity.