How old is old?

How old is old? To me old is about 75 years old. That is just my opinion. 
      My first reason is because lot's of people live to just over 75 years old. If people die before 75 years old it usually because of an accident or illness. Most guys live until 84 on average. Women live to about 86 on average.  So women live about two years longer on average.
      Another reason that I think 75 is old is; lot's of people are in or going into nursing homes. A nursing home is is when you don't take care of yourself anymore and other people do. Most people get put in the nursing home by their children or other family members. When you walk into a nursing home you usually don't see people 40 years old. You usually see people in there 70's and above.
      My last reason that 75 is old is because lot's of people 75 and over aren't as active as any other younger people. You don't see very many 75+ year olds running around the yard with there grand kids. At 75 most people are sitting or laying inside watching tv or sleeping. Lot's of people can't run at 75 cause their hips and legs are to sore. Another reason is cause they are in a nursing home and can't get out and be active
      Some people say 40-50 is old or 90-100 is old. How old do you think old is?