In her book "Bonk: The Curious Coupling of Science and Sex," author Mary Roach humorously advises readers to conduct certain experiments in private. She suggests that some experimentation may lead to awkward situations, especially if others unexpectedly enter the space while one is engaged in unconventional activities. The image of using a mirror, a tape measure, and half-undressed attire creates a playful yet sensitive scenario that highlights the intimate nature of the subject matter.

Roach's recommendation underscores the importance of discretion when exploring topics related to sex and science. The humorous tone intends to engage readers while addressing the potential embarrassment of being caught in a vulnerable moment. By suggesting that people conduct experiments when alone, she emphasizes the need for comfort and privacy in the pursuit of understanding intimate human behaviors.