Masturbation can sometimes be wrong and it can sometimes not. If you masturbate thinking about how pretty the flowers are and how you want a puppy, essentially that's not wrong. But most times, that is not the case. I believe that when one masturbates a high percentage of the time they are fantasizing about a sexual partner therefore making masturbation lust. Lust, as the Bible states, is a sin. But masturbation is something that people in general should stay away from because it's hard not to lust whilst doing it.