I think my dryer has a huge hole somewhere that these missing socks are falling into. So, I clean out the vent hose thinking I will find a wad of socks somewhere in the middle of the hose. Nope, not there. These sock mates must vanish in thin air, because nobody in my house has any idea where they are.
So, in the meantime, I'll hold on to my collection, hoping that I will stumble across the lost ones underneath a bed or stuffed in a backpack. Maybe I'll be writing a post in the near future entitled, "101 Uses for Mateless Socks".