So, SS was consistently showing up in underwear that were way too small and had holes in them. Then he'd wear the intact ones that fit properly from our house home to BM's.
After losing 6 pairs in 12 weeks to BM's, I bought 6 pairs for BM's house and 6 more for ours.
That was about 10 weeks ago and we're back down to 2 pairs of underwear that fit and have no holes. They've been replaced with ones that are too small and have holes.
BM's house is clearly an underwear abyss. It's where intact underwear go to die. It's a vortex of doom for underwear of the correct size.
And I'm terribly puzzled.