I read P&P years and years ago, and I don't really remember it, but at that time I was heavily involved in the gay community, so you'd think I'd have noticed. (In fact, that was the year my last remaining straight friend announced that she was a lesbian.) I saw the A&E movie more recently, and my impression of Charlotte in that was that she was pretty asexual, and actually not all that interested in anything physical, only in the intellectual world.