Is My Hair Wash An Extra Charge?

Every one has a different head, different hair, requiring a different amount of time. We have chosen to price shampooing similar to massage therapist (approximately $1/minute with our beautiful organic products) to be fair to our men who take anywhere from 3-10 minutes from our double washed colors who sometimes lay back in our shampoo chairs for 30-40 minutes. We want to be fair and equal, charging those who require more time (longer/thicker hair) rather than creating an 'average'.