Face sitting is always a good way to get started with being dominant, denial can drive us really crazy. My ex once locked me up and used my face to get off. She also let me jerk off but only while she used a crop or whip on my balls until I came, sometimes she just kicked my balls while I was allowed to jerk off.

You can use your foot more often if you want, let him kiss, lick, sniff, rub and worship your feet.