There are also significant differences of opinion among members of different faiths.
Jessica Taylor has been writing professionally since 2007.
She has contributed a number of articles online on topics ranging from fashion to technology to travel.
For example, 51 percent say sending flirtatious messages is always cheating, 19 percent say the same about watching pornography without a partner and 16 percent say following an ex on social media is always cheating.
But in each of these cases, at least 25 percent of respondents say these activities "sometimes" constitute cheating. New technologies muddle old assumptions about adultery, creating a gray area that couples can struggle to navigate together, said Katherine Hertlein, a therapist and professor at the University of Nevada, Las Vegas, who studies how technology affects family life.
If you're wondering what behavior is considered cheating when you're married, follow your conscience and know your partner's boundaries.
"We all have male friends and female friends, but there is a certain line that is drawn about what is appropriate and any reasonably intelligent person knows when it's crossed," says marriage and relationship counselor David Wheeler.
The Deseret News poll was conducted by Y2 Analytics and You Gov from March 17-19, 2017. The survey is a key component to the Deseret News' annual Ten Today project exploring the relevance of the Ten Commandments in modern life.
On the seventh commandment of "Thou shalt not commit adultery," millennials are generally less strict than their elders, according to the poll, though there are some issues on which they are stricter than Generation X.
The most common definition of cheating involves some sort of physical sexual activity with another person.