World's longest surviving conjoined twins worked carnival sideshow act die at the age of 68

The world's oldest set of conjoined twins, Ronnie and Donnie Gaylon have died at the age of 68 on July 4  in Dayton, Ohio

• They were joined at the waist and shared a lower digestive tract, rectum and penis, over which Donnie had control
• Each brother had their own heart, stomach and set of arms and legs
• As children, the brothers worked in the circus as a sideshow attraction to pay for their medical bills and support their nine siblings 
• The Galyons beat the previous record holders, Chang and Eng Bunker who were born in Thailand in 1811 and lived until they were 62-years-old
• Conjoined  twins is an extremely rare phenomenon that occurs once in every 200,000 live births, survival rate is usually between 5% to 25%

The world's oldest set of conjoined twins, Ronnie and Donnie Gaylon, 68, died on July 4, in their hometown of Dayton, Ohio.   Ronnie and Donnie Galyon have been turning heads since they were born on October 28, 1951 to parents Eileen and Wesley Gaylon, who were not expecting twins, much less conjoined twins. 

They were born healthy, weighing 11 pounds, 11.5 ounces, but they spent the first two years of their life in the hospital as doctors struggled to figure out a way to safely separate them. When they were told there was no guarantee that both boys would survive the surgery, Wesley and Eileen refused to operate on their sons.
For 68 years, the brothers lived face-to-face, fused from the sternum to the groin with one set of lower digestive organs. They were each born with separate hearts and stomachs and had their own set of arms and legs.  According to Ward Hall's biography, the twins mother rejected them when they were born - leaving them primarily to be raised by their father, Wesley and later their stepmother Mary.
Burdened by colossal medical bills that racked up from the twins first two years spent in the hospital and pressure to raise his family, Wesley decided to enter Donnie and Ronnie in the carnival where they had a lucrative career until they retired in 1991. 'That was the only income. They were the breadwinners,' said their youngest brother Jim, who was born when the Donnie and Ronnie were aged 11.  
The twins learned to walk when they were 29 months, learning to take turns on who would walk backwards. Their parents hired occupational therapists to teach them everyday tasks such as tying shoes, using the toilet and learning how to work with each other as both brothers were born right handed - another complexity that required intense coordination. 

Donnie and Ronnie were denied from attending the local school because officials said they would be too distracting to other students. 'It was a different era,' said their brother Jim. 
Their IQs were determined to be in the average range, but according to J. David Smith's book, Psychological Profiles of Conjoined Twins, they seemed slower due to a lack of formal education. 
The twins exhibited themselves in an air-conditioned trailer for most of their carnival show careers. They lounged about watching television while spectators paid to peer in the window to observe them conduct daily life. Old advertisements read: 'Still a sensation! The Gaylon Siamese twins, the U.S.'s most visited attraction on any Midway.'  'When we were on the road, it was all like one big family,' said Ronnie to MLive in 2014. As freak shows and carnival acts became taboo in the United States during the 1970s, the 'Sensational Siamese Twins' took their act to Central and South America where they performed as the headlining act in the circus doing magic tricks.  'They were treated totally different down there,' said their brother Jim. 'They were treated like rock stars.' 
Though Donnie and Ronnie mastered the art of compromise over the years, it wasn't always easy. Some arguments even escalated to fisticuffs, especially when they were teenagers. At the age of 14, one twin broke his foot after kicking a trailer in a fit of anger. 
The physical blows stopped when the brothers began taking blood thinners and realized that a fight could easily turn fatal. 'They get into it verbally, of course,' said Jim to MLive in 2014. 'But that's understandable when you got somebody right there 24-7, seven days a week, year after year after year.' 

In 2014, Donnie and Ronnie celebrated their longevity when they became the oldest living set of conjoined twins in the Guinness Book of World Records. The prior record holders were Chang and Eng Bunker, Chinese brothers that were born in Thailand in 1811 and lived to the age of 62. 
Of the milestone, Ronnie told the Dayton Daily News in 2014: 'It’s what me and Donnie’s always dreamed about, and we hope to get the ring, because we’ve dreamed about getting this since we were kids.' 
Despite their unconventional life, Donnie and Ronnie were clear that they lived their life with no regrets. 'We had fun when we were growing up,' said Ronnie. Donnie echoed the sentiment, 'We've had a nice life.

Conjoined Twin Facts:
• Conjoined twins occur once in every 200,000 live births.
• The survival rate is between 5 and 25 percent.
• 70 percent of all conjoined twins born alive are girls 
• Conjoined twins develop from a single fertilized egg that fails to separate completely as it divides in utero 
• The first successful separation procedure was performed in 1955 by neurosurgeon Dr. Harold Voris of Mercy Hospital in Chicago who divided conjoined twins joined at the head
Source: The University of Minnesota