What the fuck dudes, there is no way that I would allow for any of this. I don't know, maybe I am closed minded but the way I feel about girlfriend is that she is supposed to do that only with me, otherwise I don't see any point of relationship because that would be as good as any random escort.

So no, there is no way that anyone else would touch my girlfriend in any sexual way, and that includes her hair and any other part of her body.

And I would also never ask for a hairjob from woman of my life, because that's gross as fuck. This whole fetish is fucking retarded, it's not normal, but I can't fight

I am all into receiving hairjob from escort or some random girls, but I would never do that with anyone important to me.

And to set something straight - I am not going to stop you and tell you that this is wrong or anything, it's yours relationship and so it's up to you and your girlfriend. I just wanted to show my point of view, as this is what you asked for.