'The Big Bang Theory': Jim Parsons and Mayim Bialik talk Sheldon, Amy and ... you know

big-bang-theory-sheldon-amy.jpgThe question to "The Big Bang Theory" star Jim Parsons starts like this: Do you think there will come a point where Sheldon will want to ...

"Have sex?" Parsons interjects. It's a question that he's heard a lot as Sheldon and Amy ( Mayim Bialik) continue to move very slowly as a couple, as prescribed in their relationship agreement.

A consummation of the Sheldon-Amy relationship is probably a ways off, but might Sheldon ever want to move a little faster?

"No, I don't think he'll want to move faster, but I do think ... he is intrigued by Amy on that level that you would hope to feel," Parsons told Zap2it at the Paley Festival event honoring "BBT" Wednesday night (March 13). "I do think he finds something mysterious about her. He must -- why would he be with her at this level? She doesn't bug him any less than other people do. But she gets him, and there's something about her that he doesn't want to be apart from."

For her part, Amy "is generally frustrated with the slow pace of everything with Sheldon, but I think she's also not terribly troubled by it," Bialik says. "I think she can be frustrated but also be really content and kind of roll with it because it's worth it."

Bialik notes that "everything is still kind of on the table" in terms of Amy and Sheldon expressing affection for each other, thanks again to the characters' relationship contract. Two years in, they're at the holding-hands stage.

"I think that's the fun -- people have this expectation, but even conversations mean so much to them. I think that's sweet," Bialik says.

Male-female relationships have become a much bigger part of the show in its past couple of seasons as three of the four guys -- Sheldon, Leonard ( Johnny Galecki) and Howard (Simon Helberg) -- have entered long-term relationships. Even Raj ( Kunal Nayyar) is taking a few tentative steps into a relationship with Lucy ( Kate Micucci).

Co-creator Chuck Lorre says the writers didn't make a conscious decision to increase the number of women in the cast. "It just kind of evolved," he says, as a natural consequence of the four guys growing up some. "The best way to investigate a character more deeply is to put him in a relationship and see them try to deal with it."

"The Big Bang Theory" airs at 8 p.m. ET Thursdays on CBS.
Photo/Video credit: CBS