What exactly is cheating? It's a complicated question, says psychologist Cooper Lawrence.
"The definition of cheating has gotten very complicated now because you can cheat on Twitter, you can cheat by text. There's so many way you can be considered a cheater," she told Fox News Philadelphia in a recent news segment.
Fox News took to the streets of Philadelphia to see how people define cheating, and they got a variety of different responses.
"As long as the other person doesn't know it, it's fine," said one man.
"You know it when you feel it," said another.
"You see a woman walking by and you're like: Oh wow. She's pretty. But you have a wife. You're cheating on your wife right there," one woman explained.
"I think the baseline would be whether you'd be willing to do it in front of your spouse," another woman said.
According to a HuffPost/YouGov survey, 79 percent of people polled would consider it cheating if their partner sent sexy text messages or pictures to someone else. And 60 percent of people said developing a deep emotional connection with someone else would be considered cheating.
Check out the video above to see what else people had to say about infidelity, then click through the slideshow below for Hollywood's take.
Sandra Bullock was married to Jesse James for five years before it was revealed that he reportedly had an <a href="http://www.thehollywoodgossip.com/2010/03/jesse-james-cheating-on-sandra-bullock-michelle-mcgee/" target="_blank">affair with tattoo model Michelle "Bombshell" McGee</a>. Bullock spoke out about how the scandal and divorce affected her, <a href="http://hollywoodlife.com/2011/12/27/sandra-bullock-opens-up-jesse-james-scandal-cheating-interview-ap-press/" target="_blank">saying</a>, "I was perfectly content to be permanently broken."
Dita Von Teese
Burlesque star Dita Von Teese was married to shock rocker Marilyn Manson for just over a year before she <a href="http://www.people.com/people/article/0,,20005731,00.html" target="_blank">filed for divorce in January 2007</a>. Von Teese moved out on <a href="http://www.thehollywoodgossip.com/2007/04/dita-von-teese-on-love-marilyn-manson-nudity-etc/" target="_blank">Christmas Eve amid allegations</a> that Manson was having an affair with Evan Rachel Wood, then 19 years old. "I left with nothing. I knew that there was an inappropriate relationship going on in [my home], and I didn't want any part of it around to remind me," <a href="http://www.thehollywoodgossip.com/2007/04/dita-von-teese-on-love-marilyn-manson-nudity-etc/" target="_blank">she said</a>. "I didn't want that sofa. I didn't want that bed."
Eva Longoria <a href="http://www.tmz.com/2010/11/16/eva-longoria-tony-parker-divorce-san-antonio-spurs-desperate-housewives/" target="_blank">filed for divorce</a> from husband Tony Parker in November 2010, after finding out that he reportedly <a href="http://www.showbizspy.com/article/218804/tony-parker-cheated-on-eva-longoria-with-former-teammate-brent-barrys-wife-report.html" target="_blank">cheated on her</a> with the wife of his former teammate. "It wasn't about who he chose. I had moments of like: 'Okay, I'm not sexy enough? I'm not pretty enough? Am I not smart enough?' Then I immediately stopped," <a href="http://www.inquisitr.com/235531/eva-longoria-tony-parker-cheating-divorce/" target="_blank">she said</a>. "'No, no, no -- don't start doing that.' Because you can get stuck in that cycle and you can carry that onto other things."
Sienna Miller was <a href="http://www.people.com/people/archive/article/0,,20143950,00.html" target="_blank">engaged to Jude Law</a> when it was revealed that he had cheated on her with his children's nanny. Miller has spoken out about the affair and how it affected her perception of love. "What makes me sad [is] that there was a loss of innocence on my part," <a href="http://www.people.com/people/article/0,,20010446,00.html" target="_blank">she said</a>. "I was blinded by being a romantic person. I sort of feel like, 'What if I never love that vulnerably and that openly again?' But I feel like I'm really strong. I feel like I grew up."
Sophia Bush and Chad Michael Murray were <a href="http://www.people.com/people/article/0,,1109973,00.html" target="_blank">married for only five months</a> before separating amidst allegations that he was <a href="http://www.thefrisky.com/photos/10-celebrity-cheatin-triangles/cheating-triangles-g10-jpg/" target="_blank">cheating with Paris Hilton</a>. "I can't say there are no hard feelings... I feel hurt, humiliated and broken-hearted," <a href="http://www.hollywood.com/news/celebrities/3473892/sophia-bush-speaks-out-about-chad-michael-murray-split?page=all" target="_blank">she said</a>.
Usher has been accused of cheating several times in his career, both on his <a href="http://www.huffingtonpost.com/2012/09/25/tameka-raymond-ushers-ex-wife-cheating-rumors_n_1914415.html" target="_blank">ex-wife, Tameka Raymond</a>, and <a href="http://www.aceshowbiz.com/news/view/w0007421.html" target="_blank">former girlfriend, Rozonda "Chilli" Thomas</a>. "I was faithful at heart, but not faithful all the way," <a href="http://www.bet.com/celebrities/photos/word/2012/09/celebrity-quotes-of-the-week-september-21-2012.html#!091912-celebrities-word-usher-oprah-winfrey-show" target="_blank">he said</a> of his relationship with Chilli.
Kristen Stewart made headlines when photographs surfaced of her <a href="http://www.usmagazine.com/celebrity-news/news/kristen-stewart-cheats-on-robert-pattinson-with-rupert-sanders-see-all-of-the-shocking-pics-from-their-fling-2012307" target="_blank">kissing married director</a> Rupert Sanders. Stewart, who was dating Robert Pattinson at the time, issued a public apology for the affair. "This momentary indiscretion has jeopardized the most important thing in my life, the person I love and respect the most, Rob. I love him, I love him, I'm so sorry," <a href="http://www.hollywoodreporter.com/news/robert-pattinson-kristen-stewart-cosmopolis-daily-show-361619" target="_blank">she said</a>. Sanders and his wife of 10 years, Liberty Ross, <a href="http://www.usmagazine.com/celebrity-news/news/liberty-ross-asks-rupert-sanders-for-a-divorce-what-went-wrong-2013291" target="_hplink">split six months</a> after Sanders' affair with Stewart was revealed.
Whoopi Goldberg has been <a href="http://www.starpulse.com/news/index.php/2010/02/18/whoopi_goldberg_rules_out_marriage_" target="_blank">married three times</a>, but told her cohosts on The View that she has cheated while being married multiple times. "I did it five or six times… Yes, I screwed around while I was married, yeah. I made mistakes too. It happens sometimes," <a href="http://perezhilton.com/2010-04-05-whoopi-goldberg-admits-to-cheating-while-married#.UcttxD46V9V" target="_blank">she said</a>.
There is speculation that Meg Ryan and Dennis Quaid divorced because she had an <a href="http://www.complex.com/pop-culture/2012/12/the-10-most-infamous-love-triangles-in-hollywood-history/meg-ryan-dennis-quaid-russell-crowe" target="_blank">affair with Russell Crowe</a>, but Ryan has also gone on record to assert that her husband was unfaithful as well. "Dennis was not faithful to me for a very long time, and that was very painful. I found out more about that after I was divorced," <a href="http://www.dailymail.co.uk/tvshowbiz/article-1060717/Dennis-Quaid-hits-ex-wife-Meg-Ryan-claims-cheated-HER-marriage.html" target="_blank">she said</a>.
Tiger Woods became the center of a very public <a href="http://www.huffingtonpost.com/2010/08/24/rachel-uchitel-tiger-woods_n_692729.html" target="_blank">cheating scandal</a> when it was revealed that he had cheated on his wife, Elin Nordegren, with multiple women. The numerous affairs led to a <a href="http://www.people.com/people/article/0,,20414961,00.html" target="_blank">divorce</a>. Woods spoke out about why he strayed, <a href="http://xfinity.comcast.net/slideshow/entertainment-sadcelebapologies/6/" target="_blank">saying</a>, "I felt I had worked hard my entire life and deserved to enjoy all the temptations around me. I was unfaithful. I had affairs. I cheated."