Diablo 3

Okay, so here's where my embarrassment lies: I tend to jump into games that have a series, but start on the second or third one. I've done that with a good amount of books too, which is pretty upsetting. So I played Diablo 3 on a friend's computer and I loved the game so much, I bought it. However, I have never played Diablo 1 or 2. I really like the game, so I might plan on playing them at some time, but it still bugs me. I get the storyline pretty well, but I feel like I would understand it better if I had played the first two games first. Does anyone else do this?