curious

So lately I pointed out on a SM that me and partner do not have safe words when it comes to sex because we know each other and highly comfortable around each other, so I really feel like there's no need for safe word. If I don't want sex, then he can read it in my body Language and would never ask me to do anything I don't want to do, or force me to do it. For me personally, I didn't see how this was dumb. I trust him and he trust me, we both know what sex we are comfortable with and what's a normal reaction verses something indicating pain, hurt or etc. also we have this consent is pre given, so it doesn't need to be given in order to have sex, but can be withdrawn any moment, I've never had any incidents were I felt he crossed a line or one were he didn't listen and proceeded on. We do light BDSM but had a very thorough talk on hard/soft limits.