Paying for and tipping the person delivering your pizza seems like it was easier when cash was the only option. Just hand over a messy pile of bills and say “Keep the change.” Now there’s this long awkward moment where the 2 of us are standing there on the porch as the mini credit card machine makes its cell phone connection to authorize the charge. Then I have to hunch down with the burning hot pizza box on my leg to sign the little credit card receipt with a bonus math question as I add on the tip to the total. It’s enough to make me just have cereal for dinner.