I just got back from my first professional massage and have a few questions. Is it normal for them to straight up rub your entire butt? I get that it's a muscle, but the lady removed my towel at one point and went to town on my butt. Felt good...but seemed a little strange. Also, are tips expected and what's the usual rate/percentage? I gave her 5 dollars as that's all the cash I had and she seemed confused. It was 50/hr so %10 tip. Thanks!