Definition - What does Masturbation Sleeve mean?
A masturbation sleeve is a flexible tube used to enclose the penis and enhance masturbation. Masturbation sleeves have one or two openings (on one end or either end) and may include texture to increase sensation. Masturbation sleeves are offered in a variety of materials, such as plastic, silicone, and thermoplastic elastomers (TPE), a rubber-like material.
Some masturbation sleeves are designed to look and feel like a vagina, which is why they are often called pocket pussies.
Kinkly explains Masturbation Sleeve
Male masturbation sleeves serve much the same purpose as female vibrators: to increase the pleasure of solo play. That said, they can also be used with a partner. Masturbation sleeves are designed to increase sensation and create a feeling more akin to sex or oral sex than masturabation. Lubricant can (and often should) be used to enhance the experience.