Thanks for posting your query.
dose not cause dark circles
around eye or belly fat. Actually Masturbation has only psychological effect of being sick otherwise it has no known bad effects.
Dark circles around eyes are usually hereditary/genetic and may be predisposed by stress or depression
,lack of sleep or fatigue
, sunlight exposure. While belly fat also depends on you heredity and life style (eating habit and physical activities).
Eat food with rich vitamins and iron. Include fresh fruits and vegetables in your diet. Avoid fast foods and heavy diet.
Drink 6 to 8 glasses of water.
Yoga can also help you.
Apply rose water,almond oil or other natural moisturizers over dark circles.
Wear sun glasses while going out in sun.
You may visit a dermatologist
for further information.
Hope it helps.