I find it really strange that you can't comprehend this.
As said above, people have this preconceived idea of what it would be like with a child of either sex and quiet often they are actually based on life experience eg. I know far more women who grow up and have a very close relationship with their mother, go shopping, holidays etc than I do men. I know far more women who've had strained relationships with their girls when they were going through teenage years, arguments more personal, hurtful etc than mothers with boys who generally got on with it. Personally I think a lot of boys go through a very irritating age where they lack common sense and I know a lot of girls who get very know-it-ally, bossy and bloody irritating at a certain age.
These are only observations, I had no preference whatsoever when I was pregnant but for a variety of reasons I would probably have a slight preference if I were to have another. That doesn't mean I would love the baby any less, I can already feel the love I have for a baby I probably won't have for another five years and the sex doesn't matter a dot but I just have this almost subconscious idea. It's not on purpose it's just based on experience! But I know full well I will be absolutely overjoyed whatever the sex!