Unless villain is a smart player and is mixing up how he plays a set or two pair I still need to presume he's the one drawing and is trying to price himself in(I see this occurrence alot at NL25).Most fish and passives will wait to pop back their sets/two pairs on the turn or try to get you to ahng yourself on the flop.I still think a flop raise and turn push is good-if villain did trap you with the set/two pair make a note of that and avoid him in the future.