Contradictions in the ongoing storyline
Let me start by saying I love this show. I watched it right from beginning to end and sometimes watch reruns and it never grows old.
I will say though that there are many contradictions throughout the series.
The first two I can think of is in the very scene in the first episode, Sheldon and Lenard are in a sperm bank and as they begin to fill out the paperwork, Sheldon expresses doubt that he can go through with it. Lenard replies "what do you mean, you are a semi pro"........but we obviously learn as the series goes on, that Sheldon does not seem to have sexual desires at all.
The second one I think of has to do with Sheldon's financial situation. He states a few different times, that if he could afford to, he would live alone. Yet in one episode, Lenard found a bunch of Sheldon's uncashed paycheques in a drawer and when he asks why he hasn't cashed them, Sheldon replies that he doesn't want to buy things with them yet, or maybe that the things he wants to buy with them haven't been invented yet. But either way, he clearly could live on his own if he desired.
What other ones have people noticed?