As an adult I have heard and thus understand the majority of common metaphors, such as, "He's got all of his eggs in one basket."
Now I'm just gullible, I would say. The most recent example of being extremely gullible or literal in a humorous - yet embarrassing - way took place this past Friday at my little brother's eighth grade graduation. The graduation ceremony took place in the school gym. We were all packed in like sardines and it was extremely warm and humid; everyone was sweating profusely and the air was heavy. After the graduation ceremony had ended, we were all talking about how warm it was in the building and we were all dying for fresh air. My sister's boyfriend said, "I wasn't hot. I used the fan app on my phone." I said, "Really? Wow, I need that." He said, "Yeah, you just turn on the app and hold the speaker up to you." Apparently he had seen that I had completely believed him and thought this to be the greatest app of all time because after a moment he looked at me funny and said, "You know I was joking, right?" Well, no, no I didn't...