"Oh.. outside this place, yes, I use less magic, but this tower was built within these rings of power, and all of it is magicial, and powerfully so.. it needs to bleed off into other things, and the tower is designed to make it do so.  As to those, they were elementals bound to the pool, by the towers magic.  As to washing your hair..."  He took her hands in his, and drew her to one side of the pool, where it was a bit shallower, then with a wave, the water rose to cover her for an instant, then droped again to her waist, then he took soap.  "I would certainly enjoy doing that, just for the pleasure of it."  He buried his hands in her hair, and began to wash it, massaging her scalp even as he washed her hair.