4. Too Much of A Good Thing
A particularly pleasurable roll in the hay with a significant other can sometimes result in a head-splitting headache that will bring you down off that post-whoopee high in a big hurry. Sex can be a strenuous activity, particularly if it takes a while or involves multiple sessions. It could be that certain positions contribute to the likelihood of a headache, so be aware and try to avoid them if you want to decrease the chances of suffering instead of basking in the afterglow.