知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。Both of these materials are recognized as being of high quality, which is ideal for sex. The advantage of the Silicon is durability, but TPE is more realistic.There is a growing consensus that sexual health cannot be achieved and maintained without

Lubricants are used during sex with copyright sex dolls to make things easier. Lube makes penetration smoother and helps prevent tearing. Lubes are available in different consistencies including water based lubes, oil based lubes, and silicon based lubes.Phimosis is a condition in which a person has difficulties to retract the prepuce (foreskin). I