I've had two lovers who had waist-length hair. The first was very early in my sexual career, when I wasn't comfortable expressing my BDSM tendencies, and so I wasn't as forceful with her in terms of hair pulling. But I loved the way her luxurious hair would drape over the both of us during sex. The other was much later, with a woman who was my submissive ... both she and I loved hair pulling (and on occasion, hair bondage). There's nothing like doggie-style when you can grab a fistful of hair and then wrap it around your wrist twice and pull her back like reining in a horse while she's screaming in orgasm. Whew! I think I need a cold shower now.