> it’s nasty … add fecal matter … you really think when you poop it just lands neatly in the bowl and nothing goes in the air?

Mine does, but I like to aim in the bowl. You’re not pooing in handstand pose, are you? No, wait, you’re right - just think - if you can smell it, you’re putting anus molecules directly in your nose. ;)

In all seriousness, thinking poop is in the air and getting on your phone is FUD. That’s not happening in detectable or meaningful amounts. If poop was in the air enough to get on your phone, then your phone would be the last of your worries, it would be everywhere, you’d already be breathing it, it would be on your face and clothes, it would be escaping the bathroom, and everyone everywhere would be sick. That’s not happening.

Touching bathroom surfaces is a bigger concern by orders of magnitude, and personal hygiene is much bigger than that by more orders of magnitude - the only thing you need to worry about in practice is what you touch and whether you wash your hands, and you can alleviate the majority of issues touching things by grabbing one square of TP to touch things with…