"Butterflies Drink The Tears Of Turtles, Caimans, Alligators And Crocodiles As A Source Of Salt (Sodium) And Other Minerals As A Source Of Nutrition"
"These animals’ tears are not the only source of salts for butterflies; the insects also readily get salt from animal urine, muddy river banks, puddles, sweaty clothes and sweating people."
#21 goes for cats in general