Jim Parsons tends to wear his hair in a very similar manner when he's not Sheldon, so I also get the feeling it's to try to mask the fact that his hair might be thinning. I think that there was more chemistry between Penny & Leonard the first time they were dating, but I'm thinking that it was because they were dating in real life. Now, I'm not feeling it. And I can't believe that Penny still hasn't told Leonard that she loves him! I mean, good for her for not lying and saying that she does love him if she doesn't actually love him, but I can't imagine that she's still not in love with him. I want her to go talk to a therapist because clearly she's got some issues.