Do you read the whole explanation before voting on iin?

Yeah why wouldn't i.

obviously you have to...then i even do read the comments to suggest only what lacks in them... and i comment only if i feel it needs my advice ... thas what needs to be done

I do. I think in order to give the best answer you possibly can, you need to read the whole story.

Depends on my mood, and how interesting the title is. Sometimes ill just skip it.

Sometimes I'll scan to get the flavour of the story. Then, if I think I'm going to comment, I make sure I read the whole thing. I'll be honest, on occasion I do have to force myself to do it because some posts can be quite trying.

I usually do, but sometimes I don't.

tl;dr

If I don't read the description, I don't comment.

Honestly no. Not if it is long and rambling.

I usually read everything, but vote according to the question as asked in the title.
On some occasions, I've voted the other way to the title question, due to the context of the story.

Most of the time, yes.