The recent “poo jogger” sparked extraordinary worldwide interest when he was identified yesterday as a 64-year-old corporate executive from Brisbane, Australia.

Andrew Douglas Macintosh was charged with creating a public nuisance after neighbors banded together to catch the person they believed had fouled their property multiple times.

They snapped a photograph of him in the act. Holding a piece of toilet paper, he was pictured squatting over a concrete path and looking in the direction of the camera.

But the question everyone was left asking was why someone defecates in public, leaving their excrement on display for all to see.

There are many reasons why people may have the urge to go while running, ranging from gut motility to genetics.

According to a US study of 221 male and female endurance athletes, which was published in the National Library of Medicine Institutes of Health, there was a high prevalence of symptoms directly correlated with a known history of gastrointestinal problems.

Running can also alter something called mucosal permeability, which controls the passing of materials from inside the gastrointestinal tract out to the rest of the body, causing the stool to loosen and impacts how often you need to defecate.

This is because of a surge of hormones in your stomach lining from all that bouncing around your body does while you’re pounding the pavement.

Royal Melbourne Hospital’s director of gastroenterology, Dr. Geoff Hebbard, told News.com.au that certain physical activities and colonic motility were related.

“Vigorous exercise can have a significant effect on the gut although that would usually be more than a jog around the block,” he explained.

Perhaps not surprisingly, there’s been little study into the psychology behind why people would choose to poop in public, but Australian psychologist Sandy Rea said that in some unusual cases — although not specifically in Macintosh’s case — it may be to serve a “sexual fantasy.”

“There is paraphiliac disorder, which is characterized by sexual fantasies and sexual gratification,” Rea told News.com.au.

“Somewhere along the line, there’s been a wrong association between sexual fantasy and defecating in public.

“They get a thrill. They get an arousal, but underlying that gratification is anger and a thought disorder.”

Rea said the “thrill” of not being caught can be a reason to push people to continue with the dangerous public act.

“It is a big f–k you, and is where the thought and anger of the disorder comes,” she said.

“The repeat behavior, and never getting caught, reinstates the ‘I’ll do what I want to do’ mentality.”

Rea said the other reasoning behind “disturbing” public displays could be “elimination disorder.”

“This can occur when the person is really angry at someone or something,” she said. “Perhaps a person or organization. This is a revenge. The person feels entitled. If I want to do this, I can, and I will.”

Macintosh is not the only one to be caught in the act.

In September 2017, a woman from Colorado was dubbed the “mad pooper.” When out for her morning jogs, she defecated in front yards, on sidewalks and even in front of a pharmacy.

And then in the months following the “mad pooper,” a “serial pooper” attacked a college dorm at Southern Illinois University.

A report by the university’s student paper, the Daily Egyptian, states that using the laundry facilities was “fraught with peril” because someone was opening the washing machines and applying fecal matter to the interiors.

“I went down into the laundry room to wash my clothes and I opened one of the washers and noticed that it smelled like someone had taken a dump in there,” student Brian Piller told the paper.

“It kind of surprised me,” Pillar said. “I wondered if maybe someone had had an accident in their clothes or something. It never occurred to me that, you know, someone would poop on clothes in the laundry room.”

Clinical psychologist Sharon Chirban of Amplify Wellness and Performance in Boston told Men’s Health that the act of pooing in public was at the height of “vandalism crime.”

“It’s a statement,” says Chirban. “They’re expressing aggression through an egregious act.”

“As with other vandalizing behavior like tire slashing, graffiti, or salting lawns, the motivation can be anger or envy.

“Maybe the lawn pooper is envious of those in that neighborhood. Maybe the laundry pooper is angry about the laziness of others to empty washers in a timely fashion.”