In a lucid dream last night I knew I was asleep

In a lucid dream last night I knew I was dreaming/asleep, but I couldn’t prove it. I kept counting five fingers on each hand (instead of the usual 6 or even 7), and everything in the apartment was right, yet I couldn’t turn on the lights in the kitchen or bathroom, which is a giveaway. (I don’t know why, but light switches usually don’t work in dreams.) I also couldn’t wake myself up. I finally decided that I need another totem for occasions like this and just went along with the experience, then woke up instantly when I found someone sleeping in my bed.