Smartphones. Who cares? Smartphones. I only have dummy phones.

Who cares if you bunt for a base hit?

I am only young once, who cares if I'm a goofball!

It was a big story and yesterday's soup. Who cares?

Who cares about winning? We should focus on serving.

It's only the losers named 'Dave' that think having an unusual name is bad, and who cares what they think? They're named 'Dave.'