Why did I get this weird rush of heat and sweat when I ejaculated?

Question

I was masturbating and it took a really long time and a lot of lotion to ejaculate. This might be because I didn't have any visual stimuli. Anyway, when I finally did ejaculate, I got this weird surge of heat go through my body. It was actually not pleasant, as it normally is when ejaculating. When it happened I instantly started sweating...like right away. I was sweating in weird places too, like the bottom of my chin/jaw. Is all this normal? It certainly isn't for me.

Answer 1

Another part of your problem is I know that for some reason blood rushes to your brain when you ejaculate

Answer 2

It is the parasympathetic nervous system's release after ejaculation.  Pretty common to varying degree.  All your other systems slow down during sexual activity (digestion, etc.) so sometimes you feel lightheaded, nauseous, etc., after ejaculation.