I am a 48 year old male with longer hair and for me I actually find a shampoo and set very relaxing, a visit to the salon along with 40 minutes or so under the dryer with my hair in rollers allows me a chance to escape from the every day pressures of life and just escape from reality.
Unfortunately most people on this thread have pre conceived ideas of a shampoo and set due to the 60s Styles associated with them , but infact a shampoo and set can infact be anything you want it to be depending on your roller placement and comb out procedures . I urge people to actually try a shampoo and set before criticising the style.