I just don't see the BB, who you say hasn't seemed to do anything really out of line making this play without a pocket pair or AQ, AK.

He understands you are tight. Now I know there are four folds in front of you and he 'may' think you are raising with a susceptible hand because you are first in, but still I'm folding this quite quickly.

You don't see two eights or two nines enough in this spot to make this +EV. I see this play with AK a lot.