Fast forward to the part in the movie when Austin has just been speaking 'English English' with his dad (Michael Caine).

The bed rotates for them to meet Goldmember and Foxxy is standing next to him. When Goldmember peels and says 'put it in the skin box please' there is a close-up of Goldmember and Foxxy's hands. In that shot she opens the box and then the camera shoots back to Austin and Nigel. The shot goes back to Goldmember trying to eat his skin and lo and behold... Foxxy is opening the skin box again!