The reason blondes have more fun may be because...blondes account for more than 40% of cheaters.

The new study finds that blondes are more likely to cheat.  And that number may even be higher based on those in the survey who weren't willing to tell the truth.  Platinum ladies account for more than 40% of cheaters, followed by redheads, brunettes and raven-haired women.

When it comes to males, only 20% of admitted male cheaters are blonds.  Brown haired males are in fact the most likely to stray.