
I think there's a reason why seungho acts that way. Maybe in his past he too was somewhat vulnerable and fell in love but got hurt so badly that it made him act as if he doesn't get hurt or doesn't care if others get hurt. Just like in BJ Alex (dk if you read it or not but i recommend!!) Jiwon got hurt in his past by his first love and it completely changed his perspective of love until he met dong-gyun and got to know him and be with him more and more. Don't be to harsh on him you don't know whether or not if he's been hurt or traumatized by love or any type of relationship in the past.

I seriously doubt Seungho was molested or sexually assaulted by his father though... His father is probably someone with traditional values, that despises homosexuality and immorality very much. That's why he had cut the topcknot of the gay son who started to behave openly gay. Plus in that period they had a lot of troubles with the other nobles. The Yoon family were even "threatened to extinct", this added to that must left a deep scar in SH's heart even if we don't know the precise reasons yet.

Sorry, but you're sooo wrong. I can't...
Just look at this ->
http://www.mangago.zone/read-manga/yahwacheop/uu/yahwacheop-chapter-12/4/
http://www.mangago.zone/read-manga/yahwacheop/uu/iur_chapter-37.2/pg-11/

Yeah, I've seen chapter 12.
Though I didn't read the OFFICIAL translations of chapter 37, just the fan one. And I remember in page 10, Seungho didn't tell exactly the same thing to his broher about their father.
This is not the first time the official translations look mistranslated.
If you're right then things don't make much sense with the rest of the plot. In the first chap, Nakyum's thoughts about Seunho show us that SH is "a fiend for sodomy with no regard for time of place... rumored to even have had his topknot cut off by his father. A notorious hell raiser." Having the topknot cut off is huge disgrace in this era.
http://iweb7.mangapicgallery.com/imgfiles/yahwacheop/1/009.png
His family left him in the house alone, with their servants. Wy would his father taught him something like sodomy or molested him sexually if they had to leave him alone, to leave the life he wants (orgies...)?
I need to put my hands on the link of fan translations, cause I lost it.
i keep losing interest then coming back over and over again uGh