True, natural ambidexterity is rather rare (around 1 in 100), and
studies have also consistently shown the link between ambidexterity and mental health issues, and language problems (most commonly, autism and dyslexia.)
Most of you are referring to
artificial or engineered ambidexterity, which is simply the ability to reproduce certain motor skills with one's non-dominant hand through repetition and practice. That is far more likely to happen to a natural left-hander (because we live in a right-handed world), but right-handers can also acquire that 'skill.' But that is the difference: it is an acquired skill, rather than an innate, genetic ability. People in this thread are pointing out that they use their mouse right-handed, or eat right-handed. Both are simply examples of the right-handed-world syndrome: mice are always positioned on the right, so you have become accustomed to it, and thus it
feels natural. As to knives and forks, most children learn how to eat by copying their parents, and/or siblings. By the law of averages, they were probably right-handed, and so you eat right-handed as well.
(I'm naturally left handed. I use the mouse right-handed, eat right-handed, can write right-handed, and so on. But I am not
naturally ambidextrous.)