Not to mention that any bacteria thrives in more humid environments. They aren't so good at keeping moist. This is true for a lot of things, especially the smaller the thing is, including bugs. Higher humidity definitely makes good hygiene more difficult.
Why do you think bathrooms have fans? That'd be a lot of effort to deal with farts.
Considering this and your other comments I really think you need to think a bit deeper about your answers. I believe in you, just ask "and then what happens" and I'm positive you'll figure it out.
Not to mention that any bacteria thrives in more humid environments. They aren't so good at keeping moist. This is true for a lot of things, especially the smaller the thing is, including bugs. Higher humidity definitely makes good hygiene more difficult.
Why do you think bathrooms have fans? That'd be a lot of effort to deal with farts.