One example of a short joke that is appropriate for seniors is "You're over the hill when your back goes out more than you do." This is a joke about how aging affects the body and makes one less active.
Another example of a short joke for seniors is "Don't worry about avoiding temptation... as you grow older, it will avoid you." This is a funny quote from Winston Churchill, Prime Minister of the United Kingdom from
1940 to 1945 and 1951 to 1955. He was also an officer in the British Army, writer, artist and historian. Churchill won a Nobel Prize for Literature and is depicted as a great wartime leader from the 20th century.
There's another joke for older people that is about an elderly man proposing to a young woman. The man starts by getting on his knees and saying he has two things to ask the woman. The first question is "will you marry me?" When she says yes, his next question is "Will you help me back up?"
Short jokes for seniors may be told to older family members when together or written in birthday and other greeting cards for a personal touch. However, be sure that the recipient of the joke has a sense of humor.