I really don't get post nut clarity anymore. I think the only reason I ever got it was because I was told it was wrong to jack off and look at porn when I was younger. Now that the shame doesn't really exist I don't get it, I think having normal fantasies that aren't weird or fucked up helps. If you're getting that hard with your girlfriend then I think the hormones are speaking for you in the first half, then the limerence somehow stops after you splooge.

But did you know? Sexual gratification requires dopamine to get you going and once you climax you get a hit of serotonin which calms you down and lowers your sexual drive. It's why it's harder to climax when you're on SSRIs or have high serotonin. Hormones are weird.