Last summer, Josh had been away on a business trip. He finished a few days early and decided to surprise his wife. Unfortunately, he didn't get home till 3 AM. Rather than disturb her at that late hour, he quietly undressed and went to bed. As he tried to sleep, he got the feeling that someone else was in the bed with them. He was on his side of the bed and his wife was beside him, but far over on his side.
  He tried to gently move her to the other side but she wouldn't budge. And the bed didn't feel as springy as it usually did. After about an hour, he decided he had to solve this mystery or he would never get any sleep.
  So, Josh slowly (so as not to wake his wife) got out and walked over to the foot of the bed. It was dark and so he felt around...and counted...1 foot, 2 foot, 3 and 4...no more. Now, satisfied, Josh crawled back in bed and went to sleep.