Thanks for putting your query up at HealthCareMagic. Genetics plays an important role in determining the final height of an individual. The gain in height occurs with peak growth between 14 or 15 years of age continues till a certain age but stops thereafter. Chances are at 18 or 19 you will be almost done growing. You may get an extra inch or two depending on how long you ve been in puberty. The expected final height for boys= [(mother s height + 5 inches) + father s height] divided by two. So naturally you can work out the probable final height you are likely to attain. The fastest point in boys usually starts around age 11 and peaking at 13 years. During this time, boys typically grow about 4 inches each year. Therefore your height can no longer be increased. Please note that your masturbation is not related with your height and you need not feel bad about it. I hope that answers your query. Feel free to ask back if you have any further queries.