Don't have an account on tumblr so I'm posting it here.
Ushi<-cow<-boobs large as milk cows. And cow/ox/bull/etc ranks 2nd in Japanese (=Chinese version, but differs with the last one) zodiac. Up to ch34 & nico9, there will be dog x cat, mouse x cow, monkey x bird(=rooster/hen/chicken/etc), tiger x dragon, horse x wild boar (which replaces the pig in modern Chinese version), and even autumn x winter. You might want to refer to Chinese wiki.
Nezu=mouse/rat, and a "rat math" means multiplying in powers of 2, thus 2->4->8->16->32->64->etc. This comes from the rats' ability of reproducting very rapidly.
last edited at Jan 30, 2015 10:29PM