I've been attracted to such myself. Flirting doesn't necessarily mean you have any "designs" on anybody. I have a dear friend who is 80 who I would consider a flirt! But it's just her manner. I don't find it a problem. In fact, I might consider it a good recommendation for Henry Tilney. The biggest downside to it is that someone who flirts one doesn't always know when to take seriously. He may behave that way to everyone, which is pleasing, or he maybe seeking you out, but you don't know for sure until later (or you may never really know.)