Katy Perry: Orlando Bloom Is a Really Close Talker

Orlando Bloom and Katy Perry had a hot night ... of conversation after the Golden Globes.

They seemed to be getting very cozy at the Weinstein Company and Netflix after-party.

But since Katy and her bf just did a duet of "Natural Woman" -- less than 2 weeks ago -- we're sure Orlando was just chatting about his fave John Mayer tunes ... and NOT her enormous boobs.