Bad take…. Super bad take actually. A tip for someone’s service (regardless of the industry and type of service) is a sign of appreciation for said services, a sign that the person went out of their way to ensure you had a good time and that you did in fact enjoy it. At a restaurant a waitress doesn’t have to smile and laugh at your jokes, or ask how your day has been, nor do they have to ask if you’ve enjoyed your meal, keep checking on you to see if you need anything, or offer to do anything to make your experience better, they do that to make you happy and for a tip. Service providers are the same way. We don’t have to be nice when providing our services, but if we want repeat clients or to get more than the cost of the services (because in some spas girls don’t get to choose their prices, and have to pay room fees, cleaning fees, etc, meaning we have to pay out of our own pocket to give you a good time) so yes a tip is always appreciated and will almost guarantee that you always have great service. In North America, not tipping, regardless of what industry/service you’re paying for, just makes you cheap.