As the three ladies picked up a menu, each put on a pair of glasses.
"I really only need mine for close reading," explained the first.
Remarked the second, "I only use mine when the light is bad."
The third confessed, "I rarely wear mine - except when I want to see."

A friend of mine was having a bit of marital-tension in his household and was trying to figure out just what to do about it.