Actually the phallus was seen as a symbol of good luck and they were inscribed throughout towns and cities to keep away demons (typically in Roman times)
Maybe but they for sure pointed towards the brothels. Since Pompeii was a port city sailors would be traveling from all over the world and want that good puss so that was a universal symbol that showed where they can have a good dick
Guest, Jensensbooty is right. This is actually the street sign for the brothel. There is a sign carved in stone for a market and one for the baths as well. This is not to say that the Romans did not like drawing penises on things. You should see the inside of the brothel.
they do now
As they did long long long time ago