Famous last words
Ever overheard just a part of a conversation in passing? Sometimes it doesn't matter how innocent the parts you didn't hear were, your impossibly stupid brain writes its own story. Witness:
And the worst part is that now it's not enough unless she uses two.
I don't know how your brain fills in the possible story before that (feel free to post a creative comment), but odds are it's nowhere near as boring as the real story. I'll post the mundane true details if the comments get too exciting and need to be checked. Alternatively, post a sentence of your own that you've overheard recently and wish you could unhear.