American Apparel Snatches Tutorial Market Away from Teens with Web Cams
The vids are short, clean and to-the-point. Certainly helps that the demonstrator is easy to look at and listen to. (Can't help going there, but we speculate whether the Infamous Dov ever tried copping a feel. It's an unpleasant thought.)
Here's a variant called "The Dominatrix":
And here's one called "The Mini." Don't try this one first because it actually involves cutting the dress:
The videos started appearing shortly after it became clear there was a need in the sack dress how-to niche, and the only people filling it were girls whose dads will probably ground them when they discover they've been playing with their dress straps in front of expectant audiences.