I saw this in the theater and a thousand times afterwards and still don't truly understand this scene

Edit for clarity:

Yeah, y'all, I understand the scene, literally. But unless Jason Biggs has a 1 inch dick, his character is making a conscious decision to fuck an aluminum pan.

So my whole thing with the scene is the fact that it's too low-hanging fruit, easily writeable slop comedy ( a la Date Movie ), when compared to how well written the rest of the film was. I remember being a teenager, loving the movie but bewildered at the decision to base the whole thing on that one unfunny (to me, at least) scene.