Tiffany spread her blue and white striped towel across the padded lounge chair. She adjusted the position to face the sun, then slid her sunglasses on, laid down, and inserted her headphones into her ears. She was finally ready to enjoy the warmth of the sun and the little color that the SPF 50 would allow.

Positioned inside the house, Ben used the lightly tinted windows that faced the pool to his advantage. He knew from experience that during the day, the glare from the sun was very strong. Anyone outside by the pool would not be able to see what those inside were doing very well, yet those inside...