I'm not going into details in case OP is posting to get off on fart stories, but for those who think it's hilarious that this could ever be about abuse, you are so wrong.
My horribly abusive ex used to do this kind of thing when we were first married. I hated it but he thought it was so "funny". It was actually all about exerting dominance and ignoring boundaries.
I wasn't, still not, humourless about farts, just didn't want to be helplessly forced to inhale his.
Things soon escalated and I had years of hell before escaping.
So, yes, if he thinks it's gross, fucking pack it in. Why would you do something he genuinely doesn't like? Maybe find a healthier way of overcoming your hang ups?
Have you thought he doesn't just shove you off because he doesn't want to accidentally hurt you? So you're taking advantage of his consideration.
To answer your question: yes it is disrespectful as he doesn't like it. It's also juvenile.