You accept the proposal of the serious strict nurse.
She stands before you, her eyes inspecting your body like an object. "I'm going to train you..." she says with a firm voice "To please woman with your mouth! my friend is too sweet to say it directly, but your penis is useless and we are not interested in it"

Under her tutelage, you learned to worship her pussy and ass with your mouth, to move, different techniques, the rhythm of her body, the taste of her juices, and to control your breath with strictly timed sessions, sometimes you think that you are going to die, but finally,y you get it...

"Deeper, breathe through your nose" she instructed as she positions her ass above your face. You obey as she sits down on your face, teaching you to endure, to enjoy the smell and the submission.

Each day, you grew more adept at this servitude, maybe it's the medicine, but you start to love it, you can't have an erection, but your tiny penis twitches when you feel her juices or smell her intimate places.

You have a new purpose, and it's to lick, her, to please her, if you do, maybe one day, she will touch your penis, or let you fuck her... or even more, feel her tongue and her mouth...

But this moment never arrived, you finish your days as a professional pussy and ass licker, serving her until you are too old and weak, and discarded like a broken doll.

THE END
Bad ending: Strict Breath training

Task: Warm up a rubber pussy using hot water and put it inside a pair of panties. Press the rubber pussy with the panties on your face using a warm pillow (you can warm the pillow with a heater or hair dryer). Set up a stopwatch or alarm and Endure 20 seconds without breathing. Try to move your lips and moan during the process. Repeat one more time, but without the panties, and add warm lube to the rubber pussy to simulate her vaginal fluids.