He even says as much:

>"I mean, I don't have a problem with it," Venkman carried on as
>if there hadn't been ten minutes of desperate battle against an Outer
>God in between the two statements, his voice raised over the shrieks
>of the creature and the roar of massed proton streams. "It's just
>that now I know it I can't stop looking at you. Is that
>weird?"

EDIT: Also, I can't stop thinking about how thoroughly outclassed the Psi Corps were, that they never even bothered to show up for this fight. The people of Times Square and into larger New York will remember how they were saved not by the crisp black suits and gloves of the Psi Cops; they were saved by teenage girls in outlandish costumes and scruffy-looking techie types - a combination that screams IPO.