Why do Mexicans pronounce R as SH? (R assibilation)

Описание: In Mexican Spanish, R can become "SH", even in Mexican movie dubs. This is known as «R assibilation» in Spanish dialectology, and in this video I'll explain what on Earth this is and why this happens in Mexican Spanish movie dubs.

Learn how to pronounce your Spanish «soft Rs» properly with these three videos:
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Learn how to trill your Spanish Rs with this playlist:
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«R assibilation» is also called «To drag your Rs» in Spanish, and it's also common in Andean Spanish in Ecuador, Perú, and Bolivia. R assibilation is particularly common in the Ecuadorian highlands, such as Cuenca. In Chile there's also a lot of R assibilation. However, in these Spanish speaking countries R assibilation is often stigmatized, and thus avoided in formal situations. Mexico is an exception because in the capital city R assibilation is seen as a mark of social prestige. This explains why R assibilation, a dialectal feature, can be heard in the supposedly "neutral" Mexican Spanish movie dubs.