duty call

I'd like to spend more time riding you, but duty calls.

"We must go where duty call takes us," Chiun said.

Meanwhile, I have to make about six more duty calls.

You're so much better at it than I am, and duty calls.

"Sorry to interrupt your study period, Lieutenant, but duty calls."

Still, he thought, pushing open the pub's door, duty calls, and she was harmless enough if you kept your distance.

He needed someone to talk with, someone, preferably, who was not a friend of the family paying a duty call.

I would love to sit with you awhile, my friends, but duty calls.

I have to abandon your delightful wife as duty calls.

I would have preferred to spend more time rubbing your nose in how stupid you've been, but duty calls.