Under skirt face fart training

I'd love to train my slave to follow my ass around with his face buried in it while I'm outdoor. This way, he can sniff up all of my stinky farts before the smell can escape my skirt. Unfortunately, I have to train him up first, so that is what I do in this video. I begin by giving him a few farts through the fabric of my skirt just to ease him in to taking the extreme smells. After a few minutes, I pull my skirt up and make him sniff farts point blank from my nude asshole. With his mouth taped up throughout this whole clip, he can do nothing but inhale through his nostrils, so every bit of the gas makes its way into his lungs. Then I start training him to follow me around. I walk in a couple of circles, first slowly, then a bit quicker, to train the slave to keep up with my pace while he crawls with his head in my ass. When I feel satisfied, we move on to the last part of training. I pull the skirt down over his head and trap him inside.