DENVER - Calvin Klein Obsession for Men is one of the top selling fragrances for men. It doesn't matter which species.
Turns out, Obsession is a personal favorite of Krueger, the 13-year-old lion at the Denver Zoo.
"It makes sense that they would be attracted to different types of pheromones, but there's something about Calvin Klein's Obsession for Men that makes it more attractive," said Emily Insalaco, the Curator of Behavioral Husbandry.
Zoo keepers sprayed the cologne on rocks in the lion exhibit and Krueger got up and rubbed his cheek against the spot.
Insalaco explained, "He's picking up those pheromones but he was also depositing some of his."
"The Bronx actually did a study where they looked at how their cats responded to different perfumes and colognes. They should respond to perfumes and colognes because they use pheromones just like we do, but what they found was they had a lot more attention for that particular cologne," she explained.
The knowledge is useful in the field, helping researchers in Guatemala get close to jaguars, who also like Obsession.
At the Denver Zoo, they use the cologne and other scents to help enrich the animals' environment. It makes it more interesting for the animals and for the guests.
Insalaco said, "They're built to use their sense of smell, so by providing them the opportunity they're doing something that nature provided. So it's really good for them but it also provides a good opportunity for our guests. They're watching the animals do something they're built to do so they can learn more about the animals and appreciate them a little bit more."