Because even if you have a partner, sometimes they're not around when you're aroused, not up for sex when you are, or partnered sex just isn't what you're after that day. For many young people, finding a vibrator or other sex toy can be difficult, as not everywhere has a sex toy store near them many cities have zoning laws that either forbid places that sell sex toys entirely or keep them on the outskirts of town. Not only do they help keep your teeth clean, they're great for masturbation as well! Y counterparts, any sleeve you make for yourself is a one time use only due to the fact that it can't be washed or cleaned socks are the one exception to this, but for cleanliness sake wash them between every use. Lastly, while water on the external parts of the genitals is A-okay, do not direct the force of the stream inside the vagina , as that can pose some risk of damage. You can improvise your own sleeve by finding a cylinder of some kind that fits comfortably on your penis toilet paper rolls are a common choice and then lining it with a material of your choice.