How did ancient eunuchs pee?

The penis is removed, that is to say, the urethra and even the muscles that control the contraction of the urethral orifice are removed. To be clear, they can't consciously control urination! Just after cutting, check a feather on the urethra as a catheter, and then use nothing, which means that all eunuchs will be incontinent at any time! How to solve this problem? If a powerful eunuch is free, of course, he can change his clothes and trousers at any time and keep them clean. However, most of the eunuchs in the palace are handyman, so busy that they don't even have time to change clothes every day, so they have to let them dry in the shade. Therefore, most eunuchs always feel ashamed. Therefore, it is a great insult to the eunuchs to call them "smelly eunuchs, smelly eunuchs".