Is it normal to masturbate once a day?

You didn't mention how old you are. When I was a teenager I masturbated at least once a day, often twice. As time goes on you lose that frantic horniness and typically masturbate less often. But even now, when I'm almost 60, I still masturbate at least three times a week.

the only thing you're in danger of, if you're a guy, is masturbating so many times in one day that you shoot a blank.

Sperm count builds up pretty quickly though, so you'd only be infertile for a day or two at most.

Don't worry, it is not true that masturbation leads to blindness or hairy palms, lol. But seriously, masturbating several times a day is fine and not harmful to your body. It may be a good idea to try using various masturbation techniques not to get used to one and only way how to get off. However, even if your masturbation technique is always the same, you are not in danger of body damage :)

Masturbation, in moderation, does come with health benefits!

Increased mood, lower stress, and a few other health benefits associated with masturbation!

You'll be fine when i was alone i used to masturbate at least 3 times a day.