While setting up a very complex development environment I asked my colleges, why are certain configuration steps needed. They replied only "Just do it!". I see, that they may be Nike fans or deeply inspired by the Shia LaBeouf motivation speech, but I still feel like:

I mean colleague, not college. Sorry, I can't edit my rant.

Here's my ++ dear fellow friend.
* "do it"
* "you don't need to know"
* "it's too complex"
* "we've always done that way, never bothered asking"
* "historical reasons"
* "it's best this way"
* "there's no other possible solution"

Plus countless of other funny ways to say "we don't know/understand"