Ok so the guys out there know what I'm talking about...

You've plans - maybe even mutual plans for a romp in the bedroom, then...

Oh Honey - I have a headache!

C'mon do you really get a headache 3-4x a week? If so go get checked for a brain tumor - really - no one gets that many headaches!

I love my wife dearly - but she can manufacture a headache on command with the best of them.

Wouldn't it be better to just say - Sorry Honey, I don't feel like having sex tonight!? It would save a small fortune in over-the-counter pain medications that are taken as part of the ruse.

C'mon ladies - can you just be honest? less

From one who comes from a long line of migraine tortured souls I can relate to the headache from no where, but my personal rule is unless it is so bad I can't move without vomiting or my head exploding, then the pumped up blood flow has got to help make it better, right?
Now, my mother on the other hand should take stock out in pain meds taken for faking headaches to get out of anything and everything she doesn't want to participate in....I don't know about bedroom activities, but it wouldn't surprise me to find it carries over there too.
Good luck out there guys! less