Queefing... Like a lot.

So, any tips to stop so much air from going inside? It's not just from doggy style but tons of positions that just involve my legs being up. Also if he goes fast in some ways. My boyfriend is super nice about it and just tells me he didn't hear it but it makes me feel gross, as though I'm actually farting.
Can it be the shape of me as well? Or perhaps him being a tad on the big side?