When Sergi Prieto founded the world's first sex doll brothel in Barcelona, he claimed it was there to service "all fantasies".
But he insists there are some requests he turns down: two of the most common are rape fantasies and those looking to have sex with dolls resembling children.
Although he admits "lots" of suppliers will make dolls shaped like children, that is not a line he is willing to cross, the MailOnline reported.
Speaking to the Daily Star, he said: "That's an ethical option for us not to provide this kind of service.
"We could do that, but we don't want to promote this kind of behaviour.