Snape squirted some of the white, gooey liquid into his hand, grimacing. He looked at the bottle again.
'Head and shoulders' it read. Snape sighed, lathering the soap between his hands. He rubbed some on his shoulders and around his shoulder blades. Taking the remaining substance, he brushed it lightly amonsgt the greasy roots of his hair.
"Dam, damn!!" he shrieked, as some of the stuff got into his eyes' causing a burning sensation. Still swearing, he opened the shower cubicle door; half blinded by the shampoo, he kneeled down and reached blindly out to the dirty pile of laundry on the floor. Grabbing the first item of clothing that fell into his hands, he rubbed it on his eyes'. Now able to see clearly, he looked down at the object which had caused him fast relief. And swore again. He had rubbed his eyes' with his Mickey Mouse boxers. Snarling, Snape turned on the showerhead. Never again was he going to use that horrible muggle shampoo.

Snape entered Dumbledore's study and quietly sat down. Dumbledore looked up from his copy of 'The Daily Prophet' and surprise registered in his piercing blue eyes'. "Alas, Severus, your hair looks very shiny indeed"
"Thank you, Dumbledore," said Snapa, shaking his hair as a model would do in a herbal essence's advert. Dumbledore undid his long beard which he had carefully tucked into the pocket of his robes.
"Perhaps you'd like to wash mine too," he said, flashing a smile at Snape.