All you wanted to know about sleep, but were too afraid to ask. Including the useful advice that the “bedroom is only for sleep and sex” and what to do if you wake up:
If you wake up in the middle of the night, do not get up or switch on the light. Have sex instead. Hopefully your partner will enjoy being woken up by your kinky activities. You will both crash into pleasant deep sleep afterwards. If you do not have a partner, just do it yourself without switching on the lights (as I said, you can find your vital organs in the dark).
A cup of tea is not an option, due to its caffeine content.