Whether you are putting on bike shorts, board shorts, or no shorts at all, always fully clean yourself after you poop and live worry free.

Wash your ass crack well and often. If it's smelling, you aren't cleaning it often enough. If it's leaking, see a doctor.

Don't know why you'd think a clothes washer wouldn't do the job it's intended to do. If your clothes are coming out of the wash dirty, that's a different problem.

You are worry about the poop particles and not the filthy stuff the tires pick up from the road and spray all over you?

Do you have the same quandries about your normal underwear? Why wouldn't you be able to wash dirty ass outta your bike shorts?

Poop is water solable, so washing your bike shorts will wash out the poop.

When I bike ride, I just put in my bike shorts and go. I'm about to get really disgusting anyway from the sweat and road gunk flinging up. I'm going to stink and regardless, my bike shorts will probably be shoved in my crack for an hour or more.

I'll go further into disgusting and also say that since I only have two pairs of bike shorts, that if I'm training daily, I will hang dry them and put them back on the next day and get a couple wears between washes. I'm gonna shower when I'm done anyway, I don't have sensitive skin that gets irritated by dirty shorts, and my exposure to others is not existent when riding.

I'm sure I'm not alone, but I'm probably in the minority.

Wash your arse properly after taking a sh1t. Maybe invest in a toilet shower

I imagine what you normally do to prevent poop particles should be fine. Also I believe most people wear underwear under bike shorts? I cycle almost daily but just wear regular clothes or gym clothes so not entirely sure with padded bike shorts.

Also, having grown up all my life with bidets and "bum guns", it never hurts to clean down there with some water and soap anyway.

This is the sophisticated discussion and intercourse between intellectuals I come to Lemmy for.

I sponge-bathe or use a French showerhead, washing all of the bits that are going to be in the shorts. I'm not so worried about fecal matter, even though I don't want to skid-mark an expensive pair of shorts. But I am concerned with the skin flora balance.

I don't have any good advice, but I'm sorry people are being weird to you :(

so I came thinking part of your questions aws if people shower before using a bidet?