Hi Cam:
Spit may be used and you always have it handy.
The best lubrication for masturbation is the human foreskin. The highly innervated, erogenous foreskin is secured only at each extremity and is not attached to the underlying shaft of the penis. It is internally lubrication with lymphatic fluid and glides up and down the shaft of the penis without friction. The foreskin is filled with pleasure nerves that are stimulated by motion. This makes it ideal for masturbation.
Circumcision deforeskins the penis, shortens the available skin and makes it taut and immovable. Nineteenth Century doctors thought that would make masturbation impossible. It did not make impossible but it made it harder to do and less fun.
If you don’t have a foreskin, then you will need external lubrication. You will need to learn to slide your hand up and down the shaft. Some males use a personal lubricant, which is designed to provide lubricant for sexual intercourse. There is no age restriction on its purchase. Others may use petroleum jelly, such as Vaseline (which is greasy), baby oil, vegetable oil, olive oil, or saliva. Some foreskinned males also like to use lubrication, although it is not strictly necessary.
Products with harsh and irritating chemicals should be avoided. Shampoo and body wash have been reported to cause irritation and should not be used.
Unforeskinned males who try to masturbate without lubrication are likely to suffer friction irritation and pain. You may put some Jergen’s hand lotion on your penis to soothe it. It should get back to normal in about a week.