It's been reported that the average human lies about ten times per week and that we've been lying since we've been about six months old.
There are multiple excuses that people give for lying saving face protecting somebody, advancing our own goals making a story sound better.
Lying is a universally observed trait it has thought that we evolved the ability to lie as result of natural selection are able to lie more convincingly are more likely to avoid the repercussions of their actions and they're more likely to increase their desirability in the eyes of other people.