But in SM the term is most likely to refer to a tube inserted into the urethra to access the bladder. This sort of catheter is usually made of rubber, occasionally of plastic, and frequently has some form of device to hold it in place. Regretfully, so far this briefing only covers male catheterisation.
Women are also even more prone to infection.
Some of this briefing may be of relevance and interest to women, but the technical aspects are largely inapplicable. Carelessness can result in infection, injury, or other traumatic problems. You should be introduced to this kind of play in the right setting by an experienced, careful person who cares enough about you to exercise all the cautions set forth herein. Catheter games can also involve medical imagery, piss play and the peculiar penetrative vulnerability of having an object inserted deep inside the body, into what is in actual fact an internal organ. The biggest thrill for most people, though, is most likely control .