Clearly too many guys here from warm climates. Sleep naked, but then run through a cold house into the shower - shave in the shower, grab a towel before I start shivering and towel off before getting dressed. And that's with the central heating on full blast.
Lived in the middle east for 3 years - did a lot more walking around naked there...
My grandpa shaved in the shower. He'd lather up his whole body, including his face, with bath soap, then he'd turn off the water and shave using a small mirror tacked to the wall. Then he'd turn the water back on and rinse.
I do the same thing and one of my boys is carrying on the tradition, too.
Usually shave everything in front of the mirror every morning. Gf loves it.