Be, One, and Eternity are popular fragrances developed by the renowned fashion brand Calvin Klein. Each of these scents has its unique composition and characteristics, making them suitable for different occasions and preferences. Be is a unisex fragrance that features fresh and woody notes, making it a perfect choice for a casual day out. One is a unisex perfume that has a bright, citrusy scent, perfect for a summer day or a night out. Eternity is a classic fragrance with a blend of floral and woody notes, making it ideal for formal events or special occasions. Overall, Calvin Klein's Be, One, and Eternity have established themselves as must-have fragrances in the perfume world.