Re: Mood Swings
In a big picture:
Mood swings in women, even women cannot help it, let alone men can do anything about. Well, come to think of it, may be men can… 
Mood swings in men (lack of food, lack of sleep, lack of whatever) can be helped.
Least men problems are treatable.
Now if men want an excuse any other time: Just make one.
Food was not good,
sleep was not enough or
I need more whatever…
…problem solved! 
Oh I might add, it’s not like there is a guarantee that during three weeks prior women will not have ‘mood swings’.