Technically speaking, never, as long as you hold it. There are 2 types of muscles protecting you from urinating.
1. Smooth muscle that is involuntary. Excess or certain amount of urine present in your urinary bladder relaxes this muscle involuntarily.
2. Skeletal muscle that is voluntary. You can control this hence why you can hold the urine from coming out. However, you are consistently aware of this, because it is voluntary and you're voluntarily holding it. This muscle is absent in young children, hence the "accidental" urination. As you grow older, you also acquire some control of your bladder.
Problem is, when you hold your urine or feces too long, you might get really really sick. Examples are infections and kidney failures. These leads to death, especially in the case of kidney failure.
I once was on vacation in Haiti and I was afraid of using the bath rooms in the house as well as in hotels, so I had to hold it in until I got to the plane 15 days later, I believe that I had experience some discoloration in my urine as well as pain in the lower abdomen and of course, my rectum but, I am a 20 year old. I have no idea, how long I would of held out if I was older, I'm guessing not that much.
a human can go up to 3 days without using the bathroom
Probably as long as humans, but a kitty litter box should be handy for your cat and it's not wise to make a cat hold it's bowel movements or urine.
It is not possible for someone to go indefinitely without using the bathroom. The body needs to eliminate waste regularly to maintain proper functioning. If someone tries to hold their urine or stool for a prolonged period, it can lead to discomfort, health issues, and potential damage to the bladder or bowel.
Pee in the drain or sink! n00b
If you need to go, go! But do not go in your pants or on the floor. Save it for the b-room.
Go to the bathroom frequently especially if you are going to be in a situation where you cannot access a bathroom for some time. If you are in a situation where you cannot go to a bathroom avoid drinking large amounts of liquids.
Sloths can go up to a week without going to the bathroom. They have a slow metabolism, which helps them conserve energy and water.
If they are changing their clothings, no they should not be doing that without going to the bathroom. If people want to change the clothes, they must always go to the bathroom. It is very innapropriate to show nasty stuff and many people don't like it.
they can go pretty long without food but not to long without water
starts to deteriorate after 2 weeks of inactivity
You can use a method to stop or you can challenge yourself to see how long you can go without using bad words.
i think sonic goes to the bathroom at some point. the reason i say this is because in sonic lost world he says he is going to take a long steamy shower, this makes me think that he will go to the bathroom.