There are some things nearly everyone is universally disgusted by.
Rotten pieces of fruit, pus-filled sores from an infection, horrible odors that suggest something foul is nearby—we’re disgusted by these things because we know they are signs of something hazardous to our health.
Then again, some people have no problem eating food that’s dropped on the floor, or taking care of visibly sick patients in a hospital. And then when it comes to sex, disgust is a whole other confusing rabbit hole to tumble down into.