Just to let you know, I spent about 30 minutes the other day trying to figure this out. I'm still pissed that I can't figure it out.

I have Cum Shot Starlets on DVD. I went back and looked at it, but it didn't reference the original movie even though the entire DVD is a compilation. I would imagine it's a scene from one of the Pick Up Lines, Peeping Tom, or some other Odyssey series. Even IAFD isn't clear.