There was a wide spread myth/urban legend (at least in the 1980s) that you could pay to see a woman copulating with a donkey in Tijuana. As someone who grew up near the border in the 80s, I’m 99% positive this is BS. But how did this myth get spread? Was it known in other parts of the US or just areas bordering on Mexico? I’m interested in how something like this could firmly entrench itself into an urban myth.
This older answer from u/ancienthistory may help you out.