It's not your fault, we swear. Our research team has identified 5 possible explanations for this phenomenon:
Over-the-Top Sock Suspension Theory: The socks are secretly in love with each other and have formed their own society, living it up in the washing machine.
Sock Ninja Infiltration Theory: Stealthy sock ninjas are stealing your socks to use as disguises for their nefarious purposes.
Sock Necromancy Theory: Your socks have become sentient and are seeking a life of their own, leaving your feet behind.