Panty dreams

So last night I had the weirdest dream, and I'm wondering what it means. I reached into my underwear drawer and pulled out a pair of ... my mother's underpants. Oh, I thought, I must have accidentally gotten a pair of hers mixed in with my laundry when I was in San Francisco. So I reached in to get another pair and pulled out ... another pair of hers. In fact, my drawer was filled with her underpants.

What does this mean? Maybe I don't want to know?