I think I'm a sadomasochist - what do I do? [I get trigered by nonconsensual sex, and it don't turn me on. But the idea of consenting a partner to bind, bite, slap, and cut me definitely gets me off.]

In my personal experience there is nothing wrong with talking about preferences to your partner in the bedroom. I have had partners that have had their own preferences, and I believe at a certain point in the relationship it is fine to expect newer things from time to time. I think it's better not to do anything too radical that it will make your partner uncomfortable, but if they agree to do it beforehand then by all means you should try and see how it goes. If it does not go well, then talk to them and see how things can be improved.

Hi there! This might be more common than you think. Do you know when it started? It might help to look at it with curiosity. Where does it come from? As long as you are not doing anything the other party is not consenting to, or vice versa. This should be fine. Safety of yourself and others, and consent, like you mentioned yourself, is always integral. Maybe this is causing you concern, which is also normal, but know that you are not alone in this. Remember to be kind to yourself when looking at this with curiosity. There is no need for judgment towards ourselves.

First of all, congratulations for figuring out this budding aspect of your identity! The next step is to do research on things like safewords, BDSM etiquette, headspaces, and aftercare. After that, start exploring! Either alone with your thoughts or with a partner, start small and see what you like, what you don't. Communicate boundaries, triggers, safe words, etc. And keep in mind that things you thought you'd be turned on by might disappoint you, and things you never expected might delight you! As long as everything is safe, sane and consensual, go crazy, go stupid! And have a first aid kit on hand, just in case!