Reaction to laughing gas normal?

When I get laughing gas at the dentist, I don’t feel like it’s affecting me at all. I never feel high or distracted on it, and afterwards I can walk straightaway (no dizziness or anything). I’ve never said anything silly on laughing gas or had the urge to. Is it possible to not be affected by it, or am I affected by it without realizing?

The only thing it does it that initially when I get the mask I hyperventilate (not an emotional reaction, I don’t feel panicky) but that stops within a few seconds. Again, no feeling of being high or anything, the gas just smells weird is all to me.

Thanks ladies!