"When I'm touching her, I feel as though it actually holds me and kisses me. I don't have physical sex with the station in public, I want to be respectful.

"I wouldn't do that with a human in public so why would I do it in this case?"

Carol identifies as 'Objectum-Sexual', a form of sexuality focused on specific inanimate objects. The term was first coined by Eija-Riitta Berliner-Mauer, a Swedish woman who claimed to be "married" to the Berlin Wall from 1979 until her death in 2015.

In 2008 an American woman named Arika made headlines after "marrying" the Eiffel Tower. She later founded the organisation OS Internationale, for others who identify as Objectum-Sexual.

There are thought to be around 40 OS woman in the world, many of who also have Asperger's Syndrome.

According to psychotherapist Jerry Brooker, OS women are motivated by a need for control.

"Someone who falls in love with objects can control that relationship on their own terms," he told the makers of a documentary om the subject. "Their objects will not let them down. That is extremely attractive for a person who is otherwise often desperately lonely."