Apostrophe's are 'stupid. They are only in the language by mi'stake, because'some 16th century grammarian's decided that the sole remaining trace of ca'se ending's in the Engli'sh langiage wa's in fact a contraction of "hi's". Totally erroneou's of cour'se. Practically every other language manages without them.

People witter about the possibility of confusion if they aren't used, these unobservant birds failing to note that at least 99% of the language is spoken, and you can't hear an apostrophe. We manage well enough without accents; the apostrophe should be treated as what it is, a way of allowing the lower-middle-classes to feel superior. There's probably no use for possessive apostrophe's. Now stop worrying about them and enjoy life.

Men's sana in corpore sano.