hmmm, why must you always do this to me
stop pretending, you know what i'm talking about!
This was in an interview Rob gave Seventeen magazine, had to post it because this is classic Rob humor, you can find the rest on their site if you want to know everything they talked about.
Getting Deep with Kristen
"Kristen's a really great actress. I really like working with her, and she's very intense about things, and she'll go just as far as anyone else will want to go with it. If you want to go as deep as possible, into any form of material, she's more than willing to go there."