yeah but how could any thinking player be making this play for any reason other than to maximize FE.

it just seems like a retarded way to play QQ+, and in the off chance he has a set he's absolutely minimizing his chances of getting an overpair's stack, not to mention he's giving you a chance to get a free card. and his diamond over card range is pretty wide.

of course we have no reason to dismiss the possibility that he's a drooler who's saying "weee i have queens"