Dear Sir, I am Bachelor / Single. I do masturbate once or twice in a month. I feel excitement but I control it and do masturbate rarely. Is it fair or harmful?

Masturbation is natural physiological urge. By no means it is harmful (except when it is a part of compulsion and done publicly, which is considered sexual deviation). For masturbation it is said that 95% males are masturbating and rest 5% are liars!