There was something I read, and I wish I could remember the writer's name but it was an amateur writer. To avoid plagiarizing I'll give a VERY basic and brief summary: In the story, a young sub/slave searches for a mistress, and finds Her online. He says he wants to be a slave, wants a total 24/7 power exchange. Sees her picture online, and she's beautiful, and he agrees, YES he'll be Her live in slave. She instructs him to fly to another state and get picked up at the airport.
Flash forward, he lives in a dark cell 24/7 in a dark cellar in an isolated compound at the end of a remote country road, his only interaction with another human is to be physically tortured via remote control, while blindfolded. Never sees the sun or the outside, or another person. Lives a life, if you can call it that, that would make life in a super-max prison sound like heaven. She tells him she keeps him only as a pain slut to satisfy her need for emotional, mental and physical torture. Eventually his mind quickly breaks down and his body gives out.
This is not an erotic story, but a horror story.
How many newbies, minds racing with the most intense erotic fantasies they have ever had, give into sub frenzy and throw caution to the wind, not even realizing what a "no limits" submissive can really entail? How many end up like the guy in the story? I would hope, very, very few if any- after all it is only a story. But the point is, you can turn off fantasies. You cannot turn off a 24/7 lifestyle. There is a saying (and if I've mentioned it before then I apologize) that there are two problems with a submissive who claims they have no limits. One is that they won't be taken seriously, and two is...that they will.
Remember even in the best circumstances, there is a huge difference between a submissive and a slave. Very, very few people are truly willing to be the latter, even if they are well cared for by their dominant.
Careful what you wish for. Stay safe. Play hard, know your limits, but keep it safe, sane ,and consensual.