This may be a cool name for a cocktail, but if you are actually thinking about having sex on the beach in Rio, think again. Sex on the beach? No, thanks! Lewd behavior is a punishable offence But once they find their friends and choose a place to stay, off with their trunks! The reason? To keep a sexy tan line, of course! By the way, the term Barbie is very passé, and some actually consider it offensive. They usually come with surfer's trunks to avoid the overexposure on the way to the beach. This is where friends meet, where flyers to the best parties are distributed, and where you have a chance to see Cariocas in their speedos and bikinis. The beaches in Rio are more than a place to go for a dip. Gay Beaches in Rio de Janeiro A spot to meet, and make friends with locals You are in Rio.