Lacking Fellow-feeling

Sɛ ɛtua wo yonko ho a, wose ɛtua dua mu”. An Akan Proverb.

 To wit: "Sticking into your neighbour's flesh, it might just as well be sticking into a piece of wood" 

That is to describe a person whose conduct betrays obliviousness to the interest of others. Whatever affects your friend means nothing to you.This means when someone else is affected by a situation, you sarcastically presume it is a tree that is affected.