My girlfriend knows. I told her within a few times of us having sex, and got a hairjob pretty early on. She also knows that I love straight, dark hair so she dyed it black for me (naturally brown but she had a reddish hair color when we met) and began straightening it for me. I really appreciate the effort she puts in every single day. She has also grown her hair a lot since we met three years ago (it's getting close to waist, though it's still got a bit more to go and she's on the taller side).

In terms of sex, I feel like I've experienced most of my fantasies that could be accomplished with the hair length she has. There's some that can't be accessed until her hair would get to past waist/knee length, but I've had countless hairjobs, I've cum in her hair, I've made love to her hundreds of time while stroking her hair, grabbing it with two hands while pumping, getting her from behind while looking at and stroking her hair, having her hair cover my face while she rides me on top.....really most things.

I will say at times I feel bad. I don't think she would keep her hair nearly as long as she does, and I don't think she would straighten it as often as she does. I think she would also change the color. She doesn't express frustration to me about it often, but has made some comments about fearing I will want to leave her for someone with "better" hair. She's an angel and I'm very lucky to have her in my life.