Whichever hand you use to hold the phone to your ear is the same hand everyone else in your family is likely to use.
That's the word from author David Bodanis, who says the preference for holding the phone in one hand, no matter whether individuals are right- or left-handed, is one of two curious family traits.
In his book, The Secret Family, Bodanis also outlines the other trait: "Which thumb you put on top when you sit with thumbs crossed over folded hands. It's passed on culturally, not genetically, but it is usually 100 percent consistent among the kids in one family," he writes.
