My father-in-law is crazy. He has five cordless telephones in a one bedroom apartment:

#1 - living room.
#2 - kitchen.
#3 - computer desk.
#4 - bathroom.
#5 - bedroom.

The real kicker though is that he never answers the phone and he never makes any calls. Never. He will call his wife on occassion and occassionally if he is expecting her call he'll answer but that's it. He never calls anyone else and never really answers for anyone else, yet despite this he has a phone in the bathroom just in case he's in there when someone he doesn't want to talk to calls.