Fun tease and denial game (that even my more or less vanilla GF enjoys)

I play this with my girlfriend, it's vanilla enough to ease her in BDSMish activities and not scare her off but involves her being dominant enough satisfy me.

So it starts with the me stripping, laying down on the bed and getting my hands loosely tied to the head board. (bondage adds to the game but is not necessary)

An egg timer is set for one minute. During that minute my girlfriend sits on face and I try to make her cum, once the timer goes off and I have inevitably failed, she resets the timer for a minute and teases me ruthlessly. Once my minute is up she sets the timer for two minutes and I try to make her cum again, when I fail it results in two minutes of teasing for me.

It goes on like this until she cums, I'm not allowed to cum until she does but I do have to endure my "punishment" edging session every time. By the time I am successful in making her cum I've already endured multiple teasing sessions (sometimes the last one is up to 10 minutes) and am crazy to cum.

ways to make the game harder:

• she can bring me to the edge of cumming and deny me before the game starts so that I am already on the edge
• she can ride my face in the 69 position lightly teasing me during the time that I am trying to make her cum, keeping me on the edge the whole time and making it harder for me to concentrate on making her cum
• she can lift off my face taking breaks making it harder for me to get her to cum thus making the game last longer
• after she cums she doesn't have to make me cum right away she can tease for as long as she likes first
• after she cums she can make deny me again and start the game over from one minute and only let me cum once shes cum a second time (truly evil because she takes a much longer time to cum a second time)

another variation is the "punishments" can include spankings and scratching and whatever else before the timer goes on and instead of teasing me dick during while she's siting me face she can be torturing it (again making it harder for me to concentrate on making her cum

This game started off being very basic just involving the bare rules and no bondage and has evolved to include all these little extras over time, serving to ease my vanilla girlfriend into doming me.