Forty years ago I painted my partner and I still have the painting (and him).
It’s oil on canvas. The shine at the base was because there is a table lamp in front of it.
It must have been snowing as the background view shows white covered hills outside.
I used to stretch my own canvases, then prime them with white emulsion paint. Oils also require turps or substitute turps and linseed oil to thin the paints down and create glazes.
I found that they were more workable because they stay wet for days. You can cover an oil painting up with cloth and it will still be workable a day or two later.
I wonder what my art would look like if I still used oils.