He just made himself and the female fall off the branch, landing in the water bowl. I don't think he needs more incentive.
Yeah, I read about that. IIRC, parietalis males were subjected to lower temperatures for a day and a half, then they brought the temp back up and that triggered courtship behavior. About the temperature, is 6C the absolute minimum you should use or is 4C still safe? What are the risks? I assume they should be allowed to completely digest their last meal before you throw them in the fridge.