Hi there.. nothing need to be worried.. masturbation is not a rule.. there are many guys who do not mastrubate.. and this won't definitely have an impact on your marriage life.. infact excessive masturbation can affect your relation with your wife as you wil get used to masturbation techniques, position and won't be able to get used to vaginal intercourse.. if you are not comfortable in mastrubating then please don't try.. if you still have any doubts you can consult nearest sexologist in person..about small penis, many males feel they have small penis when actually they wil have normal size. Reasons for small penis could be genetic or hormonal imbalance(reduced testosterone)...