I think this has been a very big problem right from time especially with the so called 'civilization'.
Many ladies are known not to be in the mood to have sex but the guys our are. And sure, every once in a while when a lady really, really doesn't want to be intimate, here are some of the excuses she'd use:
1. I'm too tired.
2. I have my period. And it's really heavy.
3. I have to get up soooo early tomorrow.
4. I feel nauseous.
5. I'm too full from dinner. (Or breakfast. Or lunch.)
6. I'm pre-menstrual and feel really, really bloated.
7. I have a sore throat and feel a cold coming on. I don't want to get you sick.
8. I have a yeast infection.
9. I just took a shower.
10. And the oldest of them all: Not tonight honey. I have a headache.
Now let's be sincere, which of these excuses have you used?