They just hold it

This world has no toilets, like many others. But the difference is that because the people don't like the smell of their waste, people just held it in. Public peeing or pooping aren't allowed by law, but remember that doesn't necessarily stop everyone, afterall, everyone still feels all the desperation of their filled bladder and bowels. But, despite it, most can still hold it, although it isn't uncommon to see people losing control and soiling themselves.