Like many on this forum, I have a variety of bikes: 3-speeds, 10-speeds, 5-speeds, coaster brakes. And these have a variety of braking systems: coaster brake only, coaster brake with front caliper (left lever or right lever), calipers front and rear. This means that every time I get on a bike I need to think about how (and whether) I'm going to shift (stop pedaling? keep pedaling?) and how I'm going to brake (back pedal? left hand? right hand?). Life can be so complicated.