soopahgirl, have you experienced this then, or are you just asking in general?
Anyway, if men or women do cheat, 'perhaps' it's because there's something lacking in the relationship department!
because they can. because they are not in love any more. because they never were in love but got married anyways. because they are bored, and for some people variety is the spice of life. because men are away from home on business a lot. because some women are easy, because all women beleive much of what we hear, that's how i have been in relationships that started with a guy lying. oh, yes, men are great liars. there are probably other reasons i can't think of right now.
because their isnt anything in the relationship special to them, because its a revenge thing the woman has cheated! Y does anyone cheat? more than likely they r unhappy and unsatisfied! but then u ask y do they go back to their partners its because they r afraid of losing wats comportable!