Is mastrbution harmful

Is vomiting an excretion? How much does the average person sweat a night? What topic is the focus of puberty? What does memory retrieval depend on? What should be the color of urine? What is the benefits of magnetic stone in the body? Do all bacteria make you sick? How many times a day should a person stretch? Why are her periods starting later and becoming lighter each month? How many balls do aliens have? How are the different health dimensions related to one another? Respecting other opinions? Skin cells have how many pairs of chromosomes? My friends daughter took 60 500mgs of paracetmol last night she is now in the icu unit on a life support machine she was taken to hospital within 3 hours of taking them will she be all right? Does smile's prid work on boils? Can a woman live without having her period? Why do I feel better as my own? Why can a person live without their tonsils? How bad does a lip piercing hurt? I had a mouth implant more than a month ago. When i pour peroxide in the area I still have foam. Does it mean that the wound is still open?