As soon as a dad saw that his teenage son sent him a coded text message with just the letter X, he knew what that meant. You’re going to want to know what it means, too. (Photo Credit: Pixabay) In the middle of the night, West Virginia father Bert Fulks received a coded text message with only the letter “X” from his teenage son. Immediately, the dad sprung into action, calling his son to tell him that he would be there in five minutes to pick hi…