So, I couldn't actually click on this link and get through to the facebook group - this whole paragraph is the link:
Having sex can reduce a fever because of the sweat produced. Sex is also a pain reliever, ten times more effective than Valium: immediately before orgasm, levels of the hormone oxytocin rise by five times, determining a huge release of endorphins. These chemicals calm pain, from a minor headache to arthritis or migraines, and with no secondary effects. Migraines also disappear because the pressure in the brain's blood vessels is lowered while we have sex. So now we see that actually, a woman's headache is rather a good reason for having sex, not against it. - OMG Facts.
ETA: It's from here:
http://www.omg-facts.com/view/Facts/1082 Does it make anybody else want to scream out, "NO MEANS NO WHATEVER THE EXCUSE, ASSHOLE!" ??
I agreed that orgasms are good for many things, but honestly, if I tell you that I have a headache and don't want to have sex, and you come back at me with this, I will want to punch you in the face.
Why yes it does seem as if this has hit a nerve, doesn't it?