There are valid concerns with regard to bidet use. They do result in aerosolized particulates in greater number than results from wiping, which means you are literally breathing more feces.
Is it enough to be problematic? Probably not, but that may also depend on how aggressively/frequently you use them.
See also:
- Ali, Wajid, et al. “Comparing bioaerosol emission after flushing in squat and bidet toilets: Quantitative microbial risk assessment for defecation and hand washing postures.” Building and Environment 221 (2022): 109284.
- Abney, S. E., et al. “Toilet hygiene—review and research needs.” Journal of Applied Microbiology 131.6 (2021): 2705-2714.
Hate to be the bearer of bad news, but shit is literally aerosolized any time you flush the toilet. And it’s not contained the bathroom. And it doesn’t matter if the toilet seat is up or down.
Mythbusters did an episode on exactly that. It is worse than you’d think. I can’t find the actual episode right now, but someone wrote an article about it/the findings.
The other brushes were placed elsewhere in the home, including the kitchen and even an office on the other end of the building, and all of the other ones were rinsed daily but not used for brushing. At the end of the month-long experiment, the toothbrushes were analyzed by a microbiologist, and they found that every toothbrush had a microscopic amount of fecal matter on them, regardless of the distance from the bathroom. source
Bidet or not doesn’t matter. Shit is literally all over EVERYTHING. ALL the time.
Oh, and if we really wanna get fun about it, those hand dryer things……LOL dude. Sooooo much shit going EVERYWHERE.
