1 Adidas/Tango/Lynxx etc shower gel is 1 pound, so if I spent 2 pounds/week for this its nothing compared with what I earn. I also have a Niveaa men deodorant which cost 1 pound/month, 20 pence new white bath sponges from Wilkinson, also 1 pound/month.
Rarely I have clients who wants to shave, but I am prepared for that case, its not hurting anyone
Plus I have fluffy large bath robe and a lighter summer one for them plus slippers and I always show them into the shower taking the bath robe with me if they undress in there or they can take it on them if they take their clothes off in my bedroom.
My fee for one hour its a minimum wage in some countries so for the money they pay, the least I can do its to give them a good honest service and a minimum comfort they deserve.