We've all met men who think they're God's gift to women.
No matter how many times they're rebuffed in the dating game, they always bounce back.
But a study suggests those who display such a fighting spirit might be the ones favoured by evolution - the more a man believes a woman will fancy him, the more likely he is to try it on and therefore get lucky and procreate.
It also suggests that if a man's super attracted to a woman, the chances are she's not interested. It claims men are wired to get it wrong time and again because evolution is telling them not to miss a mating opportunity.
The research involved 96 male and 103 female undergraduates, who were put through a "speed-meeting" exercise, talking for three minutes to each of five potential opposite-sex mates.