I think it is okay to eat one grape from a bunch of grapes before purchasing them in the store. I think it is. I would never taste any other fruit but in my opinion the grapes are the exception. One grape. It isn’t stealing – it is the one gift the conglomerate box stores offer to us as a way of saying thank you. I always take the grape from the bag I am going to buy because most of the time they taste pretty good and i buy them anyway. I looked up my problem and found many diverse opinions about this subject. I see both sides including this response: “My father says that it is ethical to try one grape because it should be unethical to sell sour grapes. So sayeth my dad, expert grape shopper. But most stores will let you sample any produce for free. I used to think my dad was committing a crime, but, considering how many bad bananas, apples, garlic bulbs and other hidden rotten fruits & veggies I’ve purchased over the years and not had time to return, I now think it’s fair.” Now that I have processed this dilemma I don’t think I will eat another grape at a store. That is my final decision.