Answer: Orange juice naturally contains a lot of citric acid. If you ingest too much in a short amount of time, the rapid influx of citric can imbalance the hydrocholoric acid produced by your stomach and you may throw up. trhbfvZXsazx
Answer: Very simply because most toothpastes have "breath freshening" agents which tend to stick to your teeth and gums, and the cold and acidity of the orange juice reacts with menthol that tends to be in these breath freshening agents.
Answer: Orange juice is not especially good or bad for your bladder. It has a lot of vitamins and sugar so can be good for you in moderation and bad in excess. The acidity of orange juice does not measurably change the the acidity of the urine. Cranberry juice is good for treating and preventing some urinary infections due t a chemical in it that keeps some bacteria from attaching to the bladder wall.