Sex isn’t selling — at least not at one legal Aussie brothel, whose owner says online dating apps and tighter regulations are pinching her bottom line.

“Tinder and these sex dating sites have absolutely affected us,” the owner, who asked to be called only Rebecca told the Sunshine Coast Daily. “The younger generation are so willy-nilly with their sexuality, they can look at someone [on an app] and go ‘Oh you’re only a few kilometers away, let’s meet up and have sex.’”

Her brothel Lush Marcoola in Queensland has seen a staggering 40 percent drop in business last year, she said.

But men looking for lust are better off going to her brothel, she insisted, because the women who work there are likely healthier than a potential Tinder partner.

“We’re trying to educate them on the positives of coming to a legal brothel instead of a private girl on Tinder,” she said, adding that sex workers in brothels must have a sexual health certificate to reduce the spread of STIs.

She also pointed the finger at tight regulations and private prostitutes who use the apps to advertise their services.

“They advertise on Locanto, Tinder even on Gumtree; they can put photos up of themselves half naked — we can’t even do that on our website,” she said.

“We’re only able to advertise in certain places, like our website and in the newspaper,” Rebecca said. “The private girls can advertise pretty anywhere they want … they don’t have to register with the government.”

Despite the slump, Rebecca said her bawdy business won’t close.

“We’re open for business and will stay that way,” she said.