There are lots of myths about tattoos in ancient Egypt e.g. prostitutes wore tattoos of Bes, low status women only were tattooed, Amunet was a 'dancing girl'.
There are also some interesting, possible Nubian connections. Here I look at the myths and possible Nubian link.
To the left is a 'paddle doll' from the Egypt Centre perhaps showing tattoos or scarification. Such items are found in Nubia and Egypt
Fourthly, in the New Kingdom, nakedness was not simply equated with social status. Indeed, in the Amarna Period, even the royal family were shown semi-naked. The women with the depictions of Bes were very possibly high status women. It has even been suggested that one was a priestess of Hathor. There is no reason to think of these women as prostitutes. Indeed, the earliest evidence we have for prostitution in ancient egypt is for men prostituting themselves!