Anyone who's ever had to stand on line for a long time knows you usually have to piss or shit. Peeing on yourself while standing in line waiting to vote is a very real danger that can threaten your voting experience. Please make sure to limit fluid intake if you are in a district that sees a high voter turnout and long lines. If you are in such a district make sure to empty your bladder and bowels within fifteen minutes of getting into line. Trust me, you do NOT want to be the guy or gal who ends up peeing all over themselves and having to continue standing in line waiting with everyone staring at you, especially if you have an STD that makes your urine smell particularly putrid.
Worst case scenario if you feel this urge to pee or poop while standing on line try your best to hold on til you can get in a booth and just do your business there.