porn scene

I'm looking for porn scenes in which a beautiful girl would fuck with a nerd guy, that is, with an ordinary shy guy, without inflated muscles.

I know the pic is faked :)

I used to have this scene from a movie on my hard drive but it's been long gone for some time. I don't know who the actress is or the guy so all I can do is describe it and hope someone's seen it. The scene starts off with a guy making a cast mold of this lady porn stars vagina. She's telling...