One of the most interesting things for those interested in Thailand's Muay Thai is how Muay Thai itself is a highly stylized expression of Muay Thai, or what some call hypermasculinity. One of the more striking things about Thai language for those first learning it, coming from the west, is how speakers end speech with a gendered polite particle, ka or krop, basically positioning the speaker, as gendered in an almost constant process of self-declaration. This performed division of the genders may even have helped give rise to the very notions of gender fluidity that allow trans persons to simply adopt the particle of the trans- gender they are moving toward. In this sense Thailand is both rather rigid, and also fluid.
But, this is really what I'm writing about here. This gendered division, along with very hyperstylized versions of gender both feminine and masculine, is thought to not even really BE Thai, at least in a certain dimension of analysis. The stark distinctions between genders is thought to have arisen in the early part of the 19th century when Thailand (then Siam) faced extraordinary pressure from the west to "self-civilize"). In otherwords, "you better become a lot more like US, or you will get colonized (ie, civilized)". The division of the genders both visually (gendered dress was government imposed in the periods that followed), and also in terms of speech (I believe the imposition of these gendered particles) came from this somewhat radical, and also Thai-flavored adoption of western gender values, with those Victorian roots.
Of note, this self-civilization also is what likely brought about the adoption of gloves in Muay Thai (then simply Muay). So, when you say "ka" or "krop" at the end of a Thai sentence, you are also reliving the forces that also gloved the hands of Thailand's boxers.