system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does Post Nut Clarity work? Why do all the horny thoughts and feelings seem to disappear instantaneously?
gpt
It's at least partially related to your brain releasing the "gotta get fuckin" lock on your cognitive function.

When it comes to more basic/physical drives like arousal or adrenaline response, it tends to override the more cognitive portion of your brain in order to conserve/control resources. Before you go to town, you've got some base level horny swirling around and affecting your cognition, but not to the max. Once you reach post-nut, it wipes the slate to say "alright, you busted, now you're on recharge" and that ends the override and opens your cognition back up, hence giving that sensation of clarity.

It's the main reason people recommend that if you're missing an ex, or considering something down-bad, go and have an orgasm first. It clears all the arousal flags from your brain and allows you to think clearly. Should you actually get back with your ex? or were you just horny and wanting someone to get busy with.