1. Headache causes and treatment information from iVillage Total Health
Primary headache associated with sexual activity. Primary headaches are often a tension headache, migraine or cluster headache. According to the American Council for Headache Education, more than 90 percent of headaches are primary headaches.
http://yourtotalhealth.ivillage.com/headaches.html?pageNum=3

2. Problem with headaches while masterbating >> Medical Questions, Weight Loss, Pregnancy, Drugs, He...
Whilst cycling over to the doctirs, i got the headache at the back of my head again - in a way i was releived, as i defnitiely didnt want these pains just to be associated with sexual activity. My headache was gone this morning so I thought I'd...
http://steadyhealth.com/Problem_with_headaches_while_masterbating-t53691-0-asc-...

3. See? It's not because you have a small weanie after all! - Topic Powered by eve community
The current headache diagnostic criteria even distinguish between several types of primary headaches associated with sexual activity. There is evidence for a complex relationship between sexual activity and headache, particularly migraine.
http://forums.menshealth.com/eve/forums/a/tpc/f/855109121/m/813103488