I was very amused when working in Germany to be offered an "activator" at work on a Friday afternoon (yes they drink at work so much for their dedication to work) from a brandy bottle labelled "Rats Reserve"! My German colleagues didn't see the joke and explained it was meant to be so good it was from the cellars of the Rathaus (German Town Hall) where the Politicians live! -------------- and at first didn't get it while I thought that was even funnier -- suddenly they did ---- "aahhhh ratten, sehr gut!" and much hilarity!
One of the reasons we have so many rats is not that they are dirty it is because we humans strew our waste hence encouraging them to breed! And of course for their own defence they have learned to live in inaccessible places where it is unhygienic and overcrowded!
Don't want one as a pet though, much as I don't want scorpions or tarantulas!