LEECHES ARE USEFUL TOO!
I have always hated leeches – both the worm and the person They stick with you as they suck your blood until such time that they are able to suit their needs. Similar to the worm, some people does the same thing and I just hate it!
Nonetheless, there are leeches that are beneficial like those used by doctors in removing blood clot from patients. Well, human leeches are useful too because without them, we would not learn how to cope up with them. Right?`