From a man who have mastered this art for years I can honestly say it have the opposite effect

When you masturbate, remember to out some lubricants. I reccommend any natural oils, especially mustard or coconut or sunflower oil. Now don't masturbate by stroking of your penis but by massaging over it. Stroking over will cause pain and damage to your urethra as well as blood veins in it, however massaging will not cause that. Massaging will also ensure the regular buildup of the small veins there. Your penis size is highly depended on your blood veins, so don't damage them. So for your question, no masturbation never decreases penis size. It can enlarge it as well as damage the growth as per your usage. And, don't masturbate more than once a day. That's too problematic for your immunity and health. The best count is to do it thrice per week alternating days. That will boost up your semen quantity. I will reccommend you to get laid and have sex than masturbating such that your proper bodily functions can work well.

No buddy, it's just your nature.

No😂😂😂😂😂😂 did it decrease urs

Yup it does

What's mustrubation? 😂