Can anyone explain to what does the translator chats mean on chapter 2, I srsly don't get ...

well, the only guy in the translators said "Never trust anything with two heads and only one brain"... As far as I understand, it refers to all males - because they have two heads, you know, one where your brain is and the other... you know, down below... hence the expression "giving head" when referring to blowjobs...

2 heads. a head which has a brain in it, and a dick. a dick -> has a 'head'. dunno if its actually called a dick head but :/