Well I'm sure now you know what it means even if that's none of your busuness. I saw some of your comments and you really need to grow up. For info, I have siblings so I know about making fun of each other but ONLY if noone is hurt by it. You should never do that with his kink, that wouldn't just poking fun but shaming him for it. Honestly you attitude is super annoying, if making fun of him is more important than how he would feel about it, then you should be ashamed of yourself. Nothing to do wirh being sensitive, it's just caring about your siblings' feelings. If your brother don't care about you poking fun, well good, but he may not be ok with it when it concerns something so personal so think about that before doing anything.