Master Roshi, once known as a martial arts master, must have had a glorious life. At that time, there were countless beautiful women in Master Roshi who liked Master Roshi. But Master Roshi is still single, single for more than 300 years. It can be said that in Master Roshi at that time, getting married was a very simple thing. Although I don't know what happened, it must be very important for Master Roshi to let Master Roshi decide never to get married.
When Master Roshi was young, he liked Wu Taidou's daughter. Master Roshi lived after drinking the fountain of youth. Master Roshi loves Wu Taidou's daughter very much, so he should let Wu Taidou's daughter drink with him so that they can be together forever. Now I only see Master Roshi, but I don't see other women. An important thing happened 300 years ago, so Master Roshi didn't intend to get married.
Three hundred years ago, the Bick demon was a disaster. At first, Wu Taidou won't block the radio waves. At that time, many people died on the earth, possibly including Wu Taidou's daughter. So Master Roshi died, three hundred years later, Master Roshi lewd to lewd, but not promiscuous. Therefore, Master Roshi has never married any woman. If he didn't get married, he wouldn't have so many children that he doesn't even have a descendant now.
I hope my answer is helpful to you. I hope it can be adopted. Thank you.