He might have. I got my PPL with a navy buddy (who was in a deploying squadron and at sea a lot), who had gotten his CFI for fun. We were both doing it more for fun than anything else. Once I got my solo, he just kept signing me off and I was happy to buzz around by myself. Won't say how long that went on for but it was a good while. Eventually I wanted to take my GF somewhere for the weekend so we finished it up.