In ancient China, women bind their feet for cosmetic reasons, resulting in them not able to walk without help and walking in a shuffling gait.
Possibly this can be modified such that people do it for less stupid reasons.
Disclaimer: This is NOT a racist remark since I'm Chinese myself and hence entitled to freely judge Chinese customs. NOT sexist either since I'm female as well.
This really comes from an ancient Chinese novel. Imagine during the PCs' travels, they come to a place where the gender roles are completely reversed. What adventures will the PCs encounter in such a place?
A sentiment weapon that is very impressionable in terms of what is right and wrong, akin to a child. Currently, being ownerless, it is not very powerful. However, once it has found an owner, it can provide significant boosts to the wielder in an area or areas the wielder most desire. What adventures will this sentiment weapon go through? How will it develop itself in terms of power and personality?
Saril had a dream. To open a library in the windswept wastes of Naarish, so that the people of the many villages and towns spread over the hundreds of leagues of desert could discover the joys of his books. For a whole year he kept his library open, but alas, almost no one came.
That is when Saril came up with his new idea. If people didn't travel to read his books, he would travel to them! Saril closed his library, hired a team of twelve camels, loaded up the beasts with all of his books and proceeded to invent the first nomadic library.
Now children and adults alike, looked forward to hearing the bells of Saril's camels as he entered their villages, as he tirelessly traversed the deserts in a long circuitous route, visiting every village and town he came across, in turn. It came to pas that Saril's traveling library came to some fame, and that is how the folk of Naarish became literate.
A word of warning though. Naarish has only six thousand volumes. He deals with those that lose or steal his tomes quite "harshly", by bypassing the town or village which was responsible for losing one of his books for that calendar year.