Many years ago (ca. 2009?) at a previous employer we had an enterprise email scanner which included a content filtering feature which could block "pornographic images". We ended up turning it off as it had too many false positives since it was an insurance company that dealt with injuries so a lot of legitimate injury photos would get classed as porn and blocked. I think it was basically looking at how much of an ima…
For some reason "anal" and the F-bomb are the only two words I can find where it does this.
The craziest part is if you type something like "analss gland" it figures out you're trying to type "anal gland" and shuts down spellcheck, even though anal gland (dogs) is a perfectly g-rated use of the word anal.