a description of the rules to be followed during sexual intercourse such as not inflicting pain on one’s partner (biting the nipples, squeezing the balls, etc.) so as to ensure safe and pleasant sex.
The man turns very violent while having sex with his wife; he needs to be taught sexonomography.
When some resigns or retires from a job, they are on "eternity leave". This can also refer to someone who has passed away, especially someone who worked somewhere for a long time, retired/resigned, then passed away later.
Oh I'm sorry, you didn't know that Kelly is on eternity leave? She resigned and moved to Hawaii!
With regrets I would like to inform you that my boss is officially on eternity leave. I will never see or hear them again. Ever.