Ask yourself this: If you’ve got a question about horizontal jogging, who are you going to go to for advice? Jim’s Dad… or the hottie from “Desperately Seeking Susan”?

The producers of “American Pie : Book of Love” presumably asked themselves the same question. So enter Rosanna Arquette… guru of all things birds-and-bees! (who needs Tara Reid!).

Arquette, forever remembered as the adorable Roberta Glass in “Desperately Seeking Susan” (1985), plays the mother to lead, Rob (Bug Hall, “Honey, We Shrunk Ourselves”) in the David Steinberg penned-pic.

An insider tells Moviehole that Arquette’s role “Riffs the role that Eugene Levy played in part one. It’s funny and warm”.

Arquette, star of such classic movies as “Silverado”, “After Hours” and “Pulp Fiction”, joins original paternal guru Eugene Levy (his seventh time playing the part of Jim’s Dad!) for the John Putch-directed pic… now baking in Vancouver.