https://www.eurekalert.org/pub_releases ... 011617.php
Psychologists have learned that people who frequently curse are being more honest. Writing in the journal Social Psychological and Personality Science a team of researchers from the Netherlands, the UK, the USA and Hong Kong report that people who use profanity are less likely to be associated with lying and deception.
As dishonesty and profanity are both considered deviant they are often viewed as evidence of low moral standards. On the other hand, profanity can be positively associated with honesty. It is often used to express unfiltered feelings and sincerity.
In the first questionnaire 276 participants were asked to list their most commonly used and favourite swear words. They were also asked to rate their reasons for using these words and then took part in a lie test to determine whether they were being truthful or simply responding in the way they thought was socially acceptable. Those who wrote down a higher number of curse words were less likely to be lying.