The ultimate catsuit is a coverall zentai. The ultimate zentai is a suit, which covers not only the outer surface of the body, but also the inner one. Zentai hides the personality, features, emotions (see Ani. Her daily life in zentai) but the internal built-in condoms brings the appearance closer to a living sex doll, whose only purpose is to satisfy the owner at any time and in any way without any distraction.
Only the glory holes have less personality and more anonymity (especially if cocks are covered in latex)