Yusuf Zuck chased Doug Shepherd away, truly this damned eunuch and that dead weirdo Tyler Nash are just too damn out of control.
Actually, he's most afraid of this kind of person, people who have lost their birds and eggs, they'll do anything. So advising you to castrate yourself is very normal for them!
If you don't castrate yourself, they'll think you're abnormal, because if you don't, you'll die. Between castration and death, which would you choose? Besides, after castration, you don't remain a eunuch forever. With enough cultivation level and taking something like Elixir, you can grow them back, even bigger and more majestic!
Yusuf Zuck cannot accept this abnormal choice; sometimes he'd rather die than give up his little brother!
The Flying Treasure Ship shuttles through the high sky; it's said to take a year to reach the Royal City, and the ship is incredibly fast, can be described at light-speed!