I used bidets growing up (discrete unit as well as seat integrated) and 99% of the time it worked but the 1% of the time when someone's poop got stuck to the fountain head/tube was enough to turn me off. However, wiping your anus with dry toilet paper, especially if you're a grown adult with a hairy anus, is bound to leave your own poop smear on your own anus, so these days i use flushable wipes. Works too if you're using a porta potti - just carry flushable wipes with you.