[yourface]

if he isn't totally showdown bound with ace high I would bet the turn and river UI. if we check behind we give up on winning the pot from better high card hands KT KQ A2 A3 A4 etc which is a large part of his range.

with the double gutter and pair outs our turn bet doesn't cost us much if he calls and it lets us steal the pot from those hands I mentioned on the river.

edit:
what I'm getting at is that the turn bet may be slightly -ev in itself but it sets us up for a massively +ev bluff on the river