I guess there are magnetic brooches! One side goes inside your clothing and the other on the outside, and the two magnets sandwich the clothing and the brooch stays in place, pin-free!
Just an idea for you crafters. Especially for brand-buying lolis, I'm sure it'd be a MEGA plus to not have to poke holes in your expensive burando. I'd LOVE to see brooches like these up on the comm sales and such. =P Then I'd be able to wear brooches without worry.
So what do you guys think? Have you heard of these before?