My daughter is left-handed and so was my ex-husband. And so am I. For 15 years I lived in a totally left-handed household! But we still only had right-handed scissors in the house, for some reason.
In schools in the UK they seem to provide equal numbers of pairs of right- and left-handed scissors - either that or a lot of the right-handed ones have gone missing. The result is that whenever kids have to cut things out, there is a litany of "Miss! I can't use these scissors - they're left-handed!" To which I usually reply, "Now you know how we feel all the time!"