Kitten posted this in her Orgasm is Like Getting High thread. It provides a partial explanation for my condition, but not the later agitation. My thanks to Kitten:
From a medical stand point I wanted to take the time enlighten some on what happens in an orgasm.
It is a result of phenethylamine and endorphin that are released and we crave in an orgasm. They are addictive and similar to releases from some drugs.
If you ever wondered how hard it would be to quit heroin, imagine how hard it would be for you never to have sex again!!
The break down of an orgasm in complicated. Having an orgasm is like getting high. By releasing a myriad of substances into your bloodstream,you are altering Orgasms involve a complex interaction between three systems of the body: the vascular system, the nervous system, and the endocrine system. They are so complicated that it's a miracle that they happen at all!!
1.When one reaches the first state of orgasm - arousal - there is released into the bloodstream Adrenaline and Noradrenaline
which causes arousal. These are potent body stimulants, among several other effects. Your heart rate increases, blood flow increases, etc.
2.When you orgasm, into your bloodstream are released: Prolactin and Oxytocin. Oxytocin is a substance related that allows mood control; trust and niceness. Not to mention Phenethylamine and Endorphin are released. Phenethylamine [is a]
substance related to love [and] can be found in chocolate.
Endorphin are used in pain regulation opiates work on these to cause its effects.
At any given time these may also cause an increased amount of serotonin flowing through the body,improving mood (mdma works on serotonin to cause its effects,which of course is to feel really good. Do the math). As a result, chemically, you have an overwhelming sense of trust, your heart races and blood pressure increases, you feel a
sense of love, and experience a rush similar to a short but strong dose of morphine. All the while you feel really happy
I certainly felt "so very happy", to quote the old Blood, Sweat & Tears song.