It shows no real sympathy for Jane's situation and makes it appear that her father just brushes off unpleasant matters and makes them trivial. It also, to me anyway, indicates almost a contempt for women, or at least for young women -- to state that women like being "crossed in love" so they can show off to their peers is to lump all of them into the same category of silly and shallow. And lets say that even if he is attempting ironic humor, why is he written in such a way that he seems to have little fatherly feelings for his daughters? I would hope a parent would be upset at the disappointment of a daughter --but for Mr B it is another opportunity to make a bad joke.