He looks up for a moment when she laughs, unable to keep himself from wondering for a second if she's laughing at him... except by now the trust between them has grown enough that he can laugh along with her instead of pulling away. Someone who uses her own knowledge of sex to help him through his inexperience as generously as she's been doing isn't going to recoil from him over this, and he finally understands that about her even if he hasn't formally acknowledged it to himself yet.

"If a thing is worth doing, Molly, it's worth doing well. So yes, I have a subscription to a porn website, in the interest of having a better general idea of how to pursue a valuable skill."

(She's not that far off with the legal pad.)