Does masturbation cause any problems?

Basically no: Keeps you comfortable & prepare you for adult life. It will not make you stupid, short, hairy, smooth, bald, unspiritual, sterile, a lousy lover, an unfit parent / partner, or any of the other scare stuff. If you're looking at goofy internet stuff so much that you're missing out on the rest of life, get with your physician. Vary your technique to prepare you for a variety of possible partners.

Masturbation?: hi Sakura S ~ NEVER ! But consider forming a loving relationship that could become intimate. Thanks