Your scholar is incorrect.I have a chat with someone with PhD in Animal Biology and he told me Humans are also the only animal that eats spices (like hot pepper), drinks something that has strong unpleasent taste (dark coffee) and does negative actions thats hazard to their health while the acts themselves dont grant much pleasure (like smoking).
Other than that only humans are suicidal and the list goes on. Most creatures are given an instinct to survive no matter what (including humans) yet small portion of humans can still commitee a direct suicide mentally and/or physically.
Sorry if I said anything incorrectly and please excuse my bad translation. The person I talked to is a Chinese scholar.
I have dogs that drink coffee, and I take it black. Which wouldn't matter anyway, because dogs and cats are (supposedly) incapable of tasting sweet things.
Suicide is a human precept. I've seen more than one animal grieve themself to death when a long time companion has died.
There are more than a few documented cases of other primates that not only smoke cigarettes, but are homicidal under certain circumstances, become not only fond of, but addicted to, alcohol, etc.
As I've said before, the only real difference between humans and the rest of the animal kingdom is, humans have the ability to make up an excuse for anything...