Good Riddles

Question: Touching me is inevitable, I send chills down spines, yet none fear me. What am I?

Question: When you say my name, I am no longer there. What am I?

Question: A farmer is trying to cross a river with a bag of corn, a hen, and a fox. The farmer's boat is only big enough to take himself and one other item per trip. The hen cannot be left alone with the corn or she will eat it. Likewise the fox cannot be left with the hen, or the hen will be eaten. How does the farmer get all three items across the river?

Question: I can be seen, I can be not. Thanks to me, you'll fall in love. I mostly am sweet, but once I were sour. You can receive me, you can't just buy me. You only can send me, or simply share me. What Could I be?

Question: 1 11 21 1211 111221 312211 13112221 1113213211 what comes next?