It's like post traumatic stress disorder... only for your dick. Symptoms include:
"Severe fatigue and flu-like and allergy-like symptoms, such as sneezing, itchy eyes, nasal irritation, and muscle pain"Muscle pain... lol... get it? It seems everything is post traumatic these days...
Check it out for yourself http://en.wikipedia.org/wiki/Post_Orgasmic_Illness_Syndrome
Seems like the cure is to just stop wanking! ;)