Yes, any erectile tab is available in a farmacia without Rx.
If you register in a hotel as a single, when you bring a woman back the rate goes to quarto do casal - double.
I live part time in Salvador and see many Euros here on sex tours. Most want them young and black. But, surely, everything is available - young, mature, boy, girl and everything in between.
I don't hobby here so I can't give advice except for local customs.
You will get rolled in the wrong neighborhoods. Being obnoxious and throwing money around is a sure way to trouble anywhere in Brasil.
My life here is monogamous and very happy.
Boa sorte!