Thanks a lot for this story, and bringing back a bit of the pin-up style. If you are taking suggestions here are a few of mine:
Swimsuit caught on fishing line
Dress caught in elevator
Vacuum cleaner sucks clothes off
Mishaps with changing rooms doors/curtains
Clothes removed/destroyed by:
Caught on vegetation and tearing
Eaten away by moths' cloud or other critter (a classic, only in cartoons)
Disolved by acid rain / watergun / lab accident (a nice one from that period is a new material dress that melts on stage under the strong ilumination, the video is in the forum)
Burned to ashes by fire / explosion
Unraveled by being hooked into something moving away (great for oblivious exposure)
Caugth in machinery: gears, paper shreder (good for slow and unstopable stripping)
Torn by magnet because of metalic parts
And I second clothes slowly shrinking (or girl growing)
Finally, no pressure, just write what you enjoy best. Thanks again!