You could piss on her.

When she was done, I asked, "Umm, do you want me to piss on your head as well?"

You believe urine is the best hair conditioner there is.

"Would you? Really?" she said excitedly.

"Sure".

"Gosh thanks. Its hard to find nice guys who will piss on you. But all those natural oils and acids in piss are really good for my hair." She knelt down in front of the toilet.

"No problem," I said and with my penis now deflating, took aim and began soaking her hair. Piss ran down her face in rivers and onto her plain cotton white T-shirt, making it stick to her big bra-less tits and become completely transparent. Her nipples poked out like index fingers.

"Thank you so much she says afterwards, wiping piss from her eyes." She stands up and tries to kiss you on the cheek, but you back away and take the Air kiss instead.

"You're welcome Janet. Glad I could help".

She looked bashful, even with cum clinging to her hair which had sunk somewhat by being soaked in piss. "I don't suppose..."

"Hmm, what Janet?"

"Would you mind cumming on my head again sometime? Its just that was so lovely I'd love to do it again - and its so good for my hair."

"Sure. Why not?"

"Oh thank you. She reaches for her purse and brings out a pen and piece of paper and writes her name, number and address on it, hands you it (its a little damp from her hands) then leaves.