How did it start? I can't quite remember, but I'm old, so it probably started with a Color Climax magazine and a beautiful lady with a cock. When I was younger, I developed a taste for anal play. I've mentioned elsewhere various items I've used over the years and, as soon as I worked up the courage, I transitioned from home play to paying for the experience. That went from ladies with strapons, to dominatrix with strapons, to being fisted and then to TV and TS. There's something about the submissive role in it all, the being used by someone else that really gets me off. It is more of a mental release for me than a physical phsyical release, I very rarely, if ever, cum when I'm with a lady.
I'm still not satisified though, I crave something bigger each time, something bigger, something more, well, something that brings me to a new level of intensity.
Just for the record, I have no interest in guys. Sexually they do nothing for me at all, I just don't find them arousing. That's not to say that I wouldn't let one fuck me, if the situation was right, I'm not overly fussy about what goes in my ass!
Anyway, Color Climax magazines, that's where it started.