Catology is what anyone who owns a cat is doomed to practice for the rest of their 'pets' natrual life, little do most pet owners realise that they are being pulled into this dangerous cult of cats.
Guy 1: Who's that other person in your pic bro
Guy 2: thT'S MY SISTER
Guy 1: Whoah chill out motherfucker Guy 2: Sorry, I accidentally hit caps lock. Please accept my capology
Guy 1: Capology accepted. After all, you're only human
Study of cum, jizz, semen.
Could be from watching people masturbate so many times or pleasuring others until cum comes out.
Or in case of some girls, sucking dicks so many times, and so much cum is in her mouth that she could study it.