so many poeple are have sexual relationships at legal nude beaches, tyagarah at Byron bay is a prime example. everywhere you go there, somebody is doing it, in the water, in the bushes, in the dunes, and on quieter days on the open beach
There is a great deal of friction between "professional" nudists and sexual nudists. If you indulge in sexual behaviour amongst "professional" nudists, you will be crucified. There's plenty of sexual activity on every nude beach, just be discreet if you feel the need. Finding a secluded spot isn't hard to do on most beaches. Open, public sexual activity is an invite to outrage and police appearance, and resulting charges, which can be embarrassing and costly.