Did you look inside the dryer at the top? Sometimes they stick there.
Sometimes they hide out inside a pants leg.
There is a property of physics that explains this. It's called Static Cling.
Another explanation is, only one sock went into the wash at all, and the other one is still under the bed.
If these suggestions aren't helpful, don't shoot me. (You can't, anyway, you'll just ruin your computer.) Shoot the dryer. It probably ate the sock. If that doesn't work, shoot the washer. You can wash your socks in the sink, and hang them outside to dry. Then if you miss a sock, it is probably with one of your dogs, or kids, or one of the neighbor's dogs, or kids, or a passing vagrant, or God took it. You will have plenty of things to be disturbed about the livelong day.