I completely understand where you are coming from with not being able to understand sarcasm. I wasn't able to understand it either until a few years ago. For me, I was able to tell if someone was being sarcastic by the intonation in their voice, but I wasn't able to determine what they were really saying. At times it was really awkward because I would be in a situation where I was at work and I would have a very sarcastic customer come through my line. And being me, I knew they were being sarcastic, but I didn't know what they were actually hinting at. Those situations usually ended up with a long, awkward pause, and a really weird look from the customer. When I came to Allegheny is when I really mastered the fine art of sarcasm. Sarcasm was the first language of my freshmen year roommate. I had to be able to understand it to converse with her in any way. (Think about how frustrating that was!) As the year went on, I became a pro at understanding it and even at using it myself! So stick in there! It's like a fine art form...it takes practice to perfect it.