Up to the age of around 30 my experiences had taught me that females in general were very moody creatures(or so I thought) and should wear a sign about their person to indicate their mood swings i.e. maybe a medallion on a chain which said FRIENDLY on the one side and UNFRIENDLY on the other? They could then turn it depending on how they felt at the time and in turn we (Males) would know how to approach them.
But how wrong I was!
I now realise that they are just downright nasty all of the time and it's our (Males) tolerence level which has the swings. Some days we can take the moaning and bitching more than others.