Who knows, Watson? Woman's heart and mind are insoluble puzzles to the male. - Arthur Conan Doyle

To Sherlock Holmes she is always the woman. I have seldom heard him mention her under any other name.

I consider that a man's brain originally is like a little empty attic, and you have to stock it with such furniture as you choose. A fool takes in all the lumber of every sort that he comes across, so that the knowledge which might be useful to him gets crowded out, or at best is jumbled up with a lot of other things, so that he has a difficulty in laying his hands upon it. Now the skillful workman is very careful indeed as to what he takes into his brain-attic. He will have nothing but the tools which may help him in doing his work, but of these he has a large assortment, and all in the most perfect order. It is a mistake to think that that little room has elastic walls and can distend to any extent. Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

"A most painful matter to me, as you can most readily imagine, Mr Holmes. I have been cut to the quick. I understand you have already managed several delicate cases of this sort, sir, though I presume that they were hardly from the same class of society'
'No, I am descending.'
'I beg pardon?'
'My last client of the sort was a King.'
'Oh really! I had no idea. And which king?'
'The King of Scandinavia'
'What! Had he lost his wife?'
'You can understand", said Holmes suavely, 'that I extend to the affairs of my other clients the same secrecy which I promise to you in yours.