What is something you can sense that few-if-any people you know can sense? Literal answers only.

There are syringes that come prefilled with saline used to flush IVs. Some people can taste it when it’s injected, others can’t. I’m one of those who can. I can quickly learn to recognize specific people’s footsteps, so I can hear who’s approaching. Sometimes it doesn’t even depend on what footwear the person is wearing. Apparently I can hear high pitched sounds too. I’ve heard such sounds several times where people around me weren’t able to hear it, and recently I could hear an ultrasound device too, which kinda make sense since they start at around 20 kHz. Also, this isn’t about sensing, but I can slow my heart rate temporarily simply by holding my breath.

Hey hey, same on a few of these. Saline tastes like rubber bands smell, in my opinion.

pretty sure the taste is the plastic tubing. delicious microplastics