* to discover warm water
Expression used here and there by Adults
It means to discover something obvious, maybe even with lots of thought and/or effort.
"I gatti che hanno il pelo tricolore sono solo femmine! Wow!" "Ma va? Hai scoperto l'acqua calda!"
"Tricolor cats are only female! Wow!" "Oh really? You discovered warm water!"
12 out of 14 Italian speakers have heard this