Too cold to start car

None of my cars have chokes. They'll start on a 25* day without batting an eye using the same method as quoted by Bad Sport. After 30 seconds of "feathering" it, they will usually idle on their own and I can walk away.

Exactly. Never had a working choke on any of the carburetors I've had on my truck and it always cranks up fine. 25 or 100 out. What carburetor do you have? It's entirely possible it's too lean. I know, it should have a choke if it's expected to start halfway decent in cold weather, but if the carburetor is tuned correctly, it should start pretty easily without one, even when it's cold out.