People like bondage/bdsm for various reasons. Even though I'm considered kind of a veteran in it, I'm not the "I'm okay you're okay" type. Some folks are into it for healthy reasons, and some folks are just plain sick.
The line is somewhat relative, but basically it's at the level of (informed) consent. It's nice to fantasize about non consensual activities, but if you're at the point of manipulating situations to provoke non consensual violence or putting yourself in severe danger, then you're crossing the line.
There is nothing wrong with consenting adults having fun how they like, but be mindful that both sex and BDSM require that you be able to trust each other with your lives. If either of you doesn't understand the gravity of this, then you shouldn't be engaging in that kind of activity.
...but BDSM requires a degree of trust that even conventional sex doesn't. In a "normal" situation, both people would maintain some level of physical power, but in a BDSM situation, one has the physical power, and the other has to have the psychological power to handle someone else having all the physical power.
So it's deeper...the feelings can be alot more intense. As much as some people may like it to be so, there really isn't such a thing as "casual" BDSM. It's serious even if it's short term.
So as a sub or bottom who's starting out, I suggest that you think alot about your motivations...whether they come from enjoying giving someone else control, or from needing someone else to be in control in order to somehow not feel guilty about sex or something.
It's good that you're asking this question, but nobody can answer that for you but you.
