A survey of 2000 American adults by an online dating site found that 37 per cent of women have no qualms about rifling through their partners' phones, News.Com.Au reported.
However, according to poll conducted by The ourtime.Com, only 29 per cent of guys were fine with snooping into their partners' messages.
In both the cases the justification given by the participants was that they suspected their partner of 'bad behaviour'.
The study also found that young people are stricter about their dating protocol.
Among those aged between 18-34, only 41 per cent people feel happy to date more than one person at a time.
However, those aged 55 and above did not think it is necessary to follow a strict dating protocol.