yes that is normal
yes it happens every once in a while
When my wife was pregnant, I learned that in a normal pregnancy, the baby does not have a bowel movement while in the womb, but they do urinate while in the womb.
If you stop pooing while it is hangin' out, it will either fall in to the toilet or it will get sucked in and you will get constipated for the rest of your life. then you will turn fat and brown and purple and squishy. i'm serious! it happened to my sister! :(
First, I would ask what you mean by "hold in her urine". It is normal for a rat to urinate while walking sometimes or when you are holding them. My rats won't urinate in the bedding where they sleep, but they urinate all over everywhere else. i know it can be messy, but I just clean out their cages once a week and it's not much of a problem.
Yes
Yes, why wouldn't they be able to? Everyone can urinate while erect, it's just a little harder.
Yes it is
stress incontinence
Yes, but it's impractical and messy
No. While urinating your body is in simple terms clearing the waste, as the same with thorwing up. Doing it at the same time is unnatural, i suggest you do further research.
Normal toddlers urinate between 5 and 8 times per day depending on what they're drinking. Alcoholic toddlers urinate more often than that, and have a harder time seeing over the stearing wheel while driving, accounting for the high percentage of toddler DUIs.
Something to urinate in while staying on the job. Attaches to the penis.