Unwanted relics

Visiting my wife's parents, we found an old letter I'd written her that, luckily, only she saw when cleaning. It's very detailed, downright annoyingly anal semi-blueprints for an inflatable bra and an inflatable jockstrap that I'd apparently designed and sent to her. They never got made (though the letter certainly believes they were about to be made) and I feel ridiculous seeing them again. I really wish my new apartment had a fireplace so I could dispose of this properly.