Great Unanswered Questions in Music: No. 523 - Stacey's Mom

Fountains Of Wayne - Stacey's Mom
With the Milf-tastic Rachel Hunter.
The question is: What is that young boy doing at the end of the video that causes such a reaction of embarrasment from the kid, and a joyous look from the young girl?
I wouldn't have thought it's the thing that first comes into mind.

Also, am I the only one that loves, but at the same time hates, the euphamism of bottles overflowing/champagne corks bursting out and all imagery like that?