Perhaps I shouldn't brag about this but this weekend, my boyfriend and I were arguing about the difference between sourness and acidity (my native language doesn't have a difference) in eating lemons, so he dared me to eat a whole lemon without crying inside.

And so I did
I mean I don't know if the taste buds are detecting pH, but I looked up that the pH of lemons is about the same as oranges and coke, and as I expected it feels the same, just less sweet.