You want to know the difference between men and women?  It's really very simple, and it all goes back to "Not tonight, dear. I have a headache." 

A headache.  Jeeze.

So here's the difference.  A lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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(Sorry. I nodded off there. Really.  Didn't sleep well last night. My brain may not be able to stay awake, but my fingers are insomniacs.)

Anyway, so here's the diffference: A woman doesn't want to have sex because she has a headache. A man figures that sex with a headache is better than a headache without sex.  Either way, you're going to have t he headache. So you might as will do something fun while you've got it.