These all were supposedly discovered on the walls on Pompeii. Are they real? I dunno. Probably. The site where I found them documents the location of each and notes its inclusion in the Corpus Inscriptionum Latinarum (Vol. 4). Pompeii was a cesspool of human depravity, which is why the gods chose to smote it with hot magma, so it is certainly reasonable to assume you would find things like this
