Credit: SWNS / Macken Murphy<br /><br />A scientist has revealed signs your partner is cheating - including being protective over their phone and becoming newly concerned about their appearance.<br /><br />Macken Murphy, 25, studied for a Master of Science degree in cognitive and evolutionary anthropology at Oxford University and wrote about why people cheat.<br /><br />As part of his studies, Macken delved into the reasons why people cheat and read how it's often due to a desire for variety and connection.<br /><br /><br />
