No wonder... humanity seems to have lost it's ability to do the job with both hands. The other one is busy these days texting or talking. People drive and text/talk, eat, watch movies in theaters, cross the street, my daughter even exercises so (dumbbell in one hand, phone in the other, texting).
Reminds me of an old joke: a guy is driving, hugging his girlfriend at the same time... a traffic cop sees him and yells: "Both hands, buddy, both hands!" The guy yells back: "Sorry! Can't... I'm driving!"