On our first date a little over a year ago I put her across my knee and spanked her. Not too hard but enough that it stung a little. Then towards the end I tell her: "three more. I want you to count each one and say 'thank you sir.'

She got all serious and said "I'm not doing that." We'll a couple more quick smacks later she was doing it.

Everyday I spank her and have her do the countdown. Sometimes it leads to sex but not always. It is a playful thing but mostly I like the dynamic it establishes.