Tom Ford's Voile de Fleur had a hair perfume in that line that you spray right onto your hair. It was gorgeous smelling, imo, even better than the edp. I don't know if it's still being made, though.
I think quite a few people spray or rub a bit of their SotD into their hair. I read a recommendation somewhere of spraying your hairbrush with scent and then brushing your hair. I rarely brush my hair (talk about boorish, ill-mannered, and distubing, lol!
Actually, I use a very wide-toothed comb), but I might be concerned about alcohol drying my hair over the long term. I like a little spritz at the nape of my neck, and I sometimes brush my scent filled fingers through my hair as well. I like to catch a whiff of my perfumed hair on the breeze.