Somewhat offtopic but yes, leeches are in fact societally useful: https://en.wikipedia.org/wiki/Leeches#Medicinal_use_of_leeches https://en.wikipedia.org/wiki/L

Somewhat offtopic but yes, leeches are in fact societally useful: https://en.wikipedia.org/wiki/Leeches#Medicinal_use_of_leeches https://en.wikipedia.org/wiki/Leeches#Medicinal_use_of_leech...