The least unattractive moment a person can have, is usually during a yawn or a sneeze. I'm sorry, but nothing spells turn-off like mucus flying through your nose and throat at hyperspeed, or getting a slow-motion display of tonsils and/or your uvula.
Alone, these two actions, though completely normal and necessary, are pretty unfavorable. But during sex, they are downright appalling, if not offensive.
However, there is some good news for all of you who have come to believe that your partner is either allergic to you, or extremely bored. While I cannot in full faith attest to the fact that they aren't allergic or bored, I can provide the following explanation.
(Note: if you really believe you are allergic to your partner/friend with benefits, I would consult a physician, and/or immediately leave town. If you are sincerely uninterested enough to yawn during sex, I would consult a toy store, and/or immediately leave town. Until then, you can use these completely viable biological excuses.)
Yawning and Sneezing
"These aren't painful or debilitating reactions to an orgasm, but they can cause your sex partner to feel confused or insulted. One possible explanation is that in the brain, the center for orgasms is close to the centers for yawning and sneezing, says Irwin Goldstein, MD, director of San Diego Sexual Medicine and the editor in chief of the Journal of Sexual Medicine, so one center could activate another. "If your partner yawns during sexual activity, it probably means that he or she is just sexually aroused," he says."
And for those nights when you want to fake a headache, these sparkling gems of medical diagnosis continue! Apparently, sometimes really great sex can be bad for your brain. Kids: this is your brain:
And this is your brain on sex:
"There's such a tremendous excitation of the nervous system and heavy-duty brain activity during orgasm, so it's no surprise that it could trigger a migraine for some people," says Dr. Goldstein."
Good to know, Dr. Goldstein. Good. To. Know.