Mystery

A Russian woman once told me that women like three things in men: courage, a sense of humour, and mystery.

I'm not good at mystery. I talk too much about myself.

The other two, I'm reasonable at and I drop mysterious hints about my past life into conversations on occasion.

Many people tell me I am MI6, which I am not.

Men find mystery attractive in women but for some unknown reason only brunettes can be mysterious.

A moment's reflection told me the reason. It's the same reason why sunlit uplands are not mysterious whereas dark forests are.