The best thing about cybersex is that if things get a little out of hand (ha ha) one or the other party can vanish just like that. There's no real way anyone can get back at you coz you either just leave the site or report them. I think it's quite safe if discretion is observed.
Also anyones boundaries can be stretched to breaking point without worrying about physical effects.
As for myself, I find any kind of toilet stuff, painful things, name calling and abuse a huge turn off. What turns me on is someone who can string a good story together and NOT use text speak (damn that stuff annoys me). Looking forward to getting in touch soon.