Hotel guests would be able to stay for free if they agree to broadcast their sexual escapades live on the Internet.
Milton said he plans to open 100 web-cam hotels in various hotspots around the world.
He believes porn lovers will pay to watch hotel guests have sex because the sessions will be so graphic.
“The numbers are astonishing,” he said, calculating that a single hotel could generate $43.8 million a year in subscription fees from voyeurs watching from computers around the world.
Milton said he has been doing field research at more than a dozen swingers' clubs around Barcelona.
He believes the success in the hotel will be the opportunity to watch real people having sex — rather than an over-the-top experience more akin to regular porn.
“It has to be a hotel for non-swingers as well — not super-explicit where everybody's running around naked,” Milton said. “That takes the style and class out of it.”