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I had to google sexagenarian. And yes, I just turned 60.   

I get what you're saying. Thank you. Fyi, we Muslims have another rule we must follow when dealing with our aged parents which you may not be aware of and very difficult to adhere to. No harsh words or raised voice.

You already knew that providing care for the elderly and the infirm is no walk in the park. Indeed, the "no harsh words or raised voice" desideratum is a pretty tall order for those with the unenviable task of caring for people of advanced years. They have to spoon-feed them, bath them, see that they take their medicines, clean up after them ... the list of things to do painstakingly is as long as their arm.

The carrot-and-stick approach doesn't work on most of the oldies, limping, bedridden or confined to wheelchairs, many of whom are not only frail and sickly but also mentally or emotionally unstable. Their health (body and mind) is a constant source of concern. There are limits to what one can take. Unless you are someone with the patience of a saint, this is the last job you need. Many a caretaker has gone bonkers.